1
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2021-mid-2023). Electrophoresis 2024; 45:165-198. [PMID: 37670208 DOI: 10.1002/elps.202300152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/22/2023] [Accepted: 08/22/2023] [Indexed: 09/07/2023]
Abstract
This review article brings a comprehensive survey of developments and applications of high-performance capillary and microchip electromigration methods (zone electrophoresis in a free solution or in sieving media, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) for analysis, micropreparation, and physicochemical characterization of peptides in the period from 2021 up to ca. the middle of 2023. Progress in the study of electromigration properties of peptides and various aspects of their analysis, such as sample preparation, adsorption suppression, electroosmotic flow regulation, and detection, are presented. New developments in the particular capillary electromigration methods are demonstrated, and several types of their applications are reported. They cover qualitative and quantitative analysis of synthetic or isolated peptides and determination of peptides in complex biomatrices, peptide profiling of biofluids and tissues, and monitoring of chemical and enzymatic reactions and physicochemical changes of peptides. They include also amino acid and sequence analysis of peptides, peptide mapping of proteins, separation of stereoisomers of peptides, and their chiral analyses. In addition, micropreparative separations and physicochemical characterization of peptides and their interactions with other (bio)molecules by the above CE methods are described.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czechia
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2
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Ramos Y, Almeida A, Carpio J, Rodríguez‐Ulloa A, Perera Y, González LJ, Wiśniewski JR, Besada V. Gel electrophoresis/electroelution sorting fractionator combined with filter aided sample preparation for deep proteomic analysis. J Sep Sci 2022; 45:1784-1796. [DOI: 10.1002/jssc.202100992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Yassel Ramos
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Alexis Almeida
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Jenis Carpio
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Arielis Rodríguez‐Ulloa
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Yasser Perera
- China‐Cuba Biotechnology Joint Innovation Center (CCBJIC) Yongzhou Zhong Gu Biotechnology Co., Ltd Hunan Province China
- Molecular Oncology Group Pharmacology Department, Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Luis J. González
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
| | - Jacek R. Wiśniewski
- Biochemical Proteomics Group Department of Proteomics and Signal Transduction Max‐Planck‐Institute of Biochemistry Martinsried Germany
| | - Vladimir Besada
- Proteomics Group System Biology Department Center for Genetic Engineering and Biotechnology Havana Cuba
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3
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Weaver SD, Schuster-Little N, Whelan RJ. Preparative capillary electrophoresis (CE) fractionation of protein digests improves protein and peptide identification in bottom-up proteomics. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:1103-1110. [PMID: 35175250 PMCID: PMC9210495 DOI: 10.1039/d1ay02145a] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Reversed-phase liquid chromatography (RPLC) is widely used to reduce sample complexity prior to mass spectrometry (MS) analysis in bottom-up proteomics. Improving peptide separation in complex samples enables lower-abundance proteins to be identified. Multidimensional separations that combine orthogonal separation modes improve protein and peptide identifications over RPLC alone. Here we report a preparative capillary electrophoresis (CE) fractionation method that combines CE and RPLC separations. Using this method, we demonstrate improved protein and peptide identification in a tryptic digest of E. coli cell lysate, with 132 ± 33% more protein identifications and 185 ± 65% more peptide identifications over non-fractionated samples. Fractionation enables detection of lower-abundance proteins in this complex sample. We demonstrate improved coverage of ovarian cancer biomarker MUC16 isolated from conditioned cell media, with 6.73% sequence coverage using CE fractionation compared to 2.74% coverage without preparative fractionation. This new method will allow researchers performing bottom-up proteomics to harness the advantages of CE separations while using widely available LC-MS/MS instrumentation.
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Affiliation(s)
- Simon D Weaver
- Integrated Biomedical Sciences Graduate Program, University of Notre Dame, Notre Dame, IN, USA
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
| | - Naviya Schuster-Little
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
| | - Rebecca J Whelan
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, USA.
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4
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2019-mid 2021). Electrophoresis 2021; 43:82-108. [PMID: 34632606 DOI: 10.1002/elps.202100243] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/19/2022]
Abstract
The review provides a comprehensive overview of developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) for analysis, microscale isolation, and physicochemical characterization of peptides from 2019 up to approximately the middle of 2021. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis, such as sample preparation, sorption suppression, EOF control, and detection, are presented. New developments in the individual CE and CEC methods are demonstrated and several types of their applications are shown. They include qualitative and quantitative analysis, determination in complex biomatrices, monitoring of chemical and enzymatic reactions and physicochemical changes, amino acid, sequence, and chiral analyses, and peptide mapping of proteins. In addition, micropreparative separations and determination of significant physicochemical parameters of peptides by CE and CEC methods are described.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague 6, Czechia
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5
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Shimazaki Y, Yabu S. Characterization of enzymatic activity of lysozyme in lysozyme–ovotransferrin complex before and after treatment with trypsin. SEPARATION SCIENCE PLUS 2021. [DOI: 10.1002/sscp.202100030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Youji Shimazaki
- Graduate School of Science and Engineering (Science) Ehime University Matsuyama Japan
- Faculty of Science Ehime University Matsuyama Japan
| | - Shunta Yabu
- Faculty of Science Ehime University Matsuyama Japan
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6
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Šolínová V, Sázelová P, Mášová A, Jiráček J, Kašička V. Application of Capillary and Free-Flow Zone Electrophoresis for Analysis and Purification of Antimicrobial β-Alanyl-Tyrosine from Hemolymph of Fleshfly Neobellieria bullata. Molecules 2021; 26:molecules26185636. [PMID: 34577107 PMCID: PMC8469924 DOI: 10.3390/molecules26185636] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/21/2022] Open
Abstract
The problem of a growing resistance of bacteria and other microorganisms to conventional antibiotics gave rise to a search for new potent antimicrobial agents. Insect antimicrobial peptides (AMPs) seem to be promising novel potential anti-infective therapeutics. The dipeptide β-alanyl-tyrosine (β-Ala-Tyr) is one of the endogenous insect toxins exhibiting antibacterial activity against both Gram-negative and Gram-positive bacteria. Prior to testing its other antimicrobial activities, it has to be prepared in a pure form. In this study, we have developed a capillary zone electrophoresis (CZE) method for analysis of β-Ala-Tyr isolated from the extract of the hemolymph of larvae of the fleshfly Neobellieria bullata by reversed-phase high-performance liquid chromatography (RP-HPLC). Based on our previously described correlation between CZE and free-flow zone electrophoresis (FFZE), analytical CZE separation of β-Ala-Tyr and its admixtures have been converted into preparative purification of β-Ala-Tyr by FFZE with preparative capacity of 45.5 mg per hour. The high purity degree of the β-Ala-Tyr obtained by FFZE fractionation was confirmed by its subsequent CZE analysis.
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7
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2017–mid 2019). Electrophoresis 2019; 41:10-35. [DOI: 10.1002/elps.201900269] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/08/2019] [Accepted: 10/19/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and BiochemistryCzech Academy of Sciences Prague 6 Czechia
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8
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Shimazaki Y, Ochi Y, Fujimura K. Microscale isolation of native forms of lysozyme from chicken egg white by gel isoelectric focusing. Electrophoresis 2018; 39:1054-1061. [DOI: 10.1002/elps.201700445] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 01/13/2023]
Affiliation(s)
- Youji Shimazaki
- Department of Chemistry and biology; Graduate School of Science and Engineering; Ehime University; Matsuyama Japan
- Faculty of Science; Ehime University; Matsuyama Japan
| | - Yoshiko Ochi
- Faculty of Science; Ehime University; Matsuyama Japan
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9
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2015-mid 2017). Electrophoresis 2017; 39:209-234. [PMID: 28836681 DOI: 10.1002/elps.201700295] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 08/15/2017] [Accepted: 08/16/2017] [Indexed: 12/17/2022]
Abstract
The review brings a comprehensive overview of recent developments and applications of high performance capillary and microchip electroseparation methods (zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography, and electrochromatography) to analysis, microscale isolation, purification, and physicochemical and biochemical characterization of peptides in the years 2015, 2016, and ca. up to the middle of 2017. Advances in the investigation of electromigration properties of peptides and in the methodology of their analysis (sample preseparation, preconcentration and derivatization, adsorption suppression and EOF control, and detection) are described. New developments in particular CE and CEC methods are presented and several types of their applications to peptide analysis are reported: qualitative and quantitative analysis, determination in complex (bio)matrices, monitoring of chemical and enzymatical reactions and physical changes, amino acid, sequence and chiral analysis, and peptide mapping of proteins. Some micropreparative peptide separations are shown and capabilities of CE and CEC methods to provide important physicochemical characteristics of peptides are demonstrated.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Prague, Czech Republic
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10
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Xia ZJ, Liu Z, Kong FZ, Fan LY, Xiao H, Cao CX. Comparison of antimicrobial peptide purification via free-flow electrophoresis and gel filtration chromatography. Electrophoresis 2017; 38:3147-3154. [DOI: 10.1002/elps.201700187] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 08/01/2017] [Accepted: 08/02/2017] [Indexed: 01/30/2023]
Affiliation(s)
- Zhi-Jun Xia
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Zhen Liu
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Fan-Zhi Kong
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Liu-Yin Fan
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Hua Xiao
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Cheng-Xi Cao
- Laboratory of Analytical Biochemistry and Bioseparation; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
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11
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Novo P, Janasek D. Current advances and challenges in microfluidic free-flow electrophoresis-A critical review. Anal Chim Acta 2017; 991:9-29. [PMID: 29031303 DOI: 10.1016/j.aca.2017.08.017] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 12/30/2022]
Abstract
The research field on microfluidic free-flow electrophoresis has developed vast amounts of devices, methods, applications and raised new questions, often in analogy to conventional techniques from which it derives. Most efforts have been employed on device development and a myriad of architectures and fabrication techniques have been reported using simple proof-of-principle separations. As technological aspects reach a quite mature state, researchers' new challenges include the development of protocols for the separation of complex mixtures, as required in the fields of application. The success of this effort is extremely dependent on the capability to transfer the device's fabrication to an industrial setting as well as to ensure interfacing simplicity, namely at the solutions' supply and collection, and actuation such as electric potential application and temperature control. Other advanced applications such as direct interfacing to downstream systems such as mass spectrometry, integration of sensing and feedback controls will require further development in the laboratory. In this review we provide an overview on the field, from basic concepts, through advanced developments both in the theoretical and experimental arenas, and addressing the above details. A comprehensive survey of designs, materials and applications is presented with particular highlights to most recent developments, namely the integration of electrodes, flow control and hyphenation of microfluidic free-flow electrophoresis with other techniques.
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Affiliation(s)
- Pedro Novo
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227, Otto-Hahn-Str. 6b, Dortmund, Germany
| | - Dirk Janasek
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227, Otto-Hahn-Str. 6b, Dortmund, Germany.
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12
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Šalplachta J, Horká M, Šlais K. Preparative isoelectric focusing in a cellulose-based separation medium. J Sep Sci 2017; 40:2498-2505. [PMID: 28432777 DOI: 10.1002/jssc.201700036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 04/04/2017] [Accepted: 04/10/2017] [Indexed: 01/04/2023]
Abstract
An improved preparative method based on isoelectric focusing of analytes in a cellulose-based separation medium is described in this study. Cellulose is suspended in an aqueous solution of simple buffers, ethylene glycol, glycerol, nonionic surfactant, and colored pI markers. Water partially evaporates during focusing run and the separation takes place in an in situ generated layer of cellulose, which has a gel-like appearance at the end of analysis. Final positions of analytes are indicated by the positions of zones of focused pI markers. Fractions, segments of the separation medium with analytes, can be simply collected by spatula and analyzed by downstream analytical methods. Good focusing ability of the new method and almost quantitative recovery of model proteins, cytochrome c and bovine serum albumin, was verified by gel electrophoresis and capillary isoelectric focusing of the collected fractions.
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Affiliation(s)
- Jiří Šalplachta
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Marie Horká
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
| | - Karel Šlais
- Institute of Analytical Chemistry of the CAS, Brno, Czech Republic
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13
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Lee KH, Kwon JH, Kim DM. Direct translational analysis of electrophoretically separated DNA using a cell-free protein synthesis system. J IND ENG CHEM 2017. [DOI: 10.1016/j.jiec.2016.09.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Yang Y, Kong FZ, Liu J, Li JM, Liu XP, Li GQ, Wang JF, Xiao H, Fan LY, Cao CX, Li S. Enhancing resolution of free-flow zone electrophoresis via a simple sheath-flow sample injection. Electrophoresis 2016; 37:1992-7. [DOI: 10.1002/elps.201600002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 04/01/2016] [Accepted: 04/05/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Ying Yang
- School of Bioscience and Bioengineering; South China University of Technology; Guangzhou P. R. China
| | - Fan-Zhi Kong
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Ji Liu
- School of Bioscience and Bioengineering; South China University of Technology; Guangzhou P. R. China
| | - Jun-Min Li
- School of Bioscience and Bioengineering; South China University of Technology; Guangzhou P. R. China
| | - Xiao-Ping Liu
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Guo-Qing Li
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Ju-Fang Wang
- School of Bioscience and Bioengineering; South China University of Technology; Guangzhou P. R. China
| | - Hua Xiao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Liu-Yin Fan
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Cheng-Xi Cao
- Laboratory of Analytical Biochemistry and Bioseparation, State Key Laboratory of Microbial Metabolism, School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai P. R. China
| | - Shan Li
- School of Bioscience and Bioengineering; South China University of Technology; Guangzhou P. R. China
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15
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Hosken BD, Li C, Mullappally B, Co C, Zhang B. Isolation and Characterization of Monoclonal Antibody Charge Variants by Free Flow Isoelectric Focusing. Anal Chem 2016; 88:5662-9. [DOI: 10.1021/acs.analchem.5b03946] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian D. Hosken
- Department of Protein Analytical Chemistry, ‡Department of Biological Technologies, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
| | - Charlene Li
- Department of Protein Analytical Chemistry, ‡Department of Biological Technologies, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
| | - Berny Mullappally
- Department of Protein Analytical Chemistry, ‡Department of Biological Technologies, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
| | - Carl Co
- Department of Protein Analytical Chemistry, ‡Department of Biological Technologies, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
| | - Boyan Zhang
- Department of Protein Analytical Chemistry, ‡Department of Biological Technologies, Genentech, 1 DNA Way, South San Francisco, California 94080, United States
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16
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Barciszewska M, Sucha A, Bałabańska S, Chmielewski MK. Gel electrophoresis in a polyvinylalcohol coated fused silica capillary for purity assessment of modified and secondary-structured oligo- and polyribonucleotides. Sci Rep 2016; 6:19437. [PMID: 26777121 PMCID: PMC4726012 DOI: 10.1038/srep19437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 12/14/2015] [Indexed: 12/12/2022] Open
Abstract
Application of a polyvinylalcohol-coated (PVA-coated) capillary in capillary gel electrophoresis (CGE) enables the selective separation of oligoribonucleotides and their modifications at high resolution. Quality assessment of shorter oligomers of small interfering RNA (siRNA) is of key importance for ribonucleic acid (RNA) technology which is increasingly being applied in medical applications. CGE is a technique of choice for calculation of chemically synthesized RNAs and their modifications which are frequently obtained as a mixture including shorter oligoribonucleotides. The use of CGE with a PVA-coated capillary to analyze siRNA mixtures presents an alternative to conventionally employed techniques. Here, we present study on identification of the length and purity of RNA mixture ingredients by using PVA-coated capillaries. Also, we demonstrate the use of PVA-coated capillaries to identify and separate phosphorylated siRNAs and secondary structures (e.g. siRNA duplexes).
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Affiliation(s)
- Martyna Barciszewska
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Agnieszka Sucha
- Poznan Science and Technology Park, Adam Mickiewicz University Foundation, Rubież 46, 61-612 Poznań, Poland
- FutureSynthesis sp. z o.o. ul, Rubież 46, 61-612 Poznań, Poland
| | - Sandra Bałabańska
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | - Marcin K. Chmielewski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
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17
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2013-middle 2015). Electrophoresis 2015; 37:162-88. [DOI: 10.1002/elps.201500329] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 08/25/2015] [Accepted: 08/25/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, v.v.i; The Czech Academy of Sciences; Prague Czech Republic
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18
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Reciprocating free-flow isoelectric focusing device for preparative separation of proteins. J Chromatogr A 2015; 1422:318-324. [DOI: 10.1016/j.chroma.2015.10.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/07/2015] [Accepted: 10/08/2015] [Indexed: 12/12/2022]
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19
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Agostino FJ, Krylov SN. Advances in steady-state continuous-flow purification by small-scale free-flow electrophoresis. Trends Analyt Chem 2015. [DOI: 10.1016/j.trac.2015.03.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Dutta D. An analytic description of electrodynamic dispersion in free-flow zone electrophoresis. J Chromatogr A 2015; 1404:124-30. [PMID: 26044384 DOI: 10.1016/j.chroma.2015.05.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 05/12/2015] [Accepted: 05/17/2015] [Indexed: 01/11/2023]
Abstract
The present work analyzes the electrodynamic dispersion of sample streams in a free-flow zone electrophoresis (FFZE) chamber resulting due to partial or complete blockage of electroosmotic flow (EOF) across the channel width by the sidewalls of the conduit. This blockage of EOF has been assumed to generate a pressure-driven backflow in the transverse direction for maintaining flow balance in the system. A parallel-plate based FFZE device with the analyte stream located far away from the channel side regions has been considered to simplify the current analysis. Applying a method-of-moments formulation, an analytic expression was derived for the variance of the sample zone at steady state as a function of its position in the separation chamber under these conditions. It has been shown that the increase in stream broadening due to the electrodynamic dispersion phenomenon is additive to the contributions from molecular diffusion and sample injection, and simply modifies the coefficient for the hydrodynamic dispersion term for a fixed lateral migration distance of the sample stream. Moreover, this dispersion mechanism can dominate the overall spatial variance of analyte zones when a significant fraction of the EOF is blocked by the channel sidewalls. The analysis also shows that analyte streams do not undergo any hydrodynamic broadening due to unwanted pressure-driven cross-flows in an FFZE chamber in the absence of a transverse electric field. The noted results have been validated using Monte Carlo simulations which further demonstrate that while the sample concentration profile at the channel outlet approaches a Gaussian distribution only in FFZE chambers substantially longer than the product of the axial pressure-driven velocity and the characteristic diffusion time in the system, the spatial variance of the exiting analyte stream is well described by the Taylor-Aris dispersion limit even in analysis ducts much shorter than this length scale.
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Affiliation(s)
- Debashis Dutta
- Department of Chemistry, (Dept. # 3838), University of Wyoming, 1000 East University Avenue, Laramie, WY 82071 USA.
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21
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Target protein separation and preparation by free-flow electrophoresis coupled with charge-to-mass ratio analysis. J Chromatogr A 2015; 1397:73-80. [DOI: 10.1016/j.chroma.2015.04.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 04/01/2015] [Accepted: 04/04/2015] [Indexed: 11/15/2022]
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22
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Kinde TF, Lopez TD, Dutta D. Electrophoretic extraction of low molecular weight cationic analytes from sodium dodecyl sulfate containing sample matrices for their direct electrospray ionization mass spectrometry. Anal Chem 2015; 87:2702-9. [PMID: 25664891 PMCID: PMC4455540 DOI: 10.1021/ac503903j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
While the use of sodium dodecyl sulfate (SDS) in separation buffers allows efficient analysis of complex mixtures, its presence in the sample matrix is known to severely interfere with the mass-spectrometric characterization of analyte molecules. In this article, we report a microfluidic device that addresses this analytical challenge by enabling inline electrospray ionization mass spectrometry (ESI-MS) of low molecular weight cationic samples prepared in SDS containing matrices. The functionality of this device relies on the continuous extraction of analyte molecules into an SDS-free solvent stream based on the free-flow zone electrophoresis (FFZE) technique prior to their ESI-MS analysis. The reported extraction was accomplished in our current work in a glass channel with microelectrodes fabricated along its sidewalls to realize the desired electric field. Our experiments show that a key challenge to successfully operating such a device is to suppress the electroosmotically driven fluid circulations generated in its extraction channel that otherwise tend to vigorously mix the liquid streams flowing through this duct. A new coating medium, N-(2-triethoxysilylpropyl) formamide, recently demonstrated by our laboratory to nearly eliminate electroosmotic flow in glass microchannels was employed to address this issue. Applying this surface modifier, we were able to efficiently extract two different peptides, human angiotensin I and MRFA, individually from an SDS containing matrix using the FFZE method and detect them at concentrations down to 3.7 and 6.3 μg/mL, respectively, in samples containing as much as 10 mM SDS. Notice that in addition to greatly reducing the amount of SDS entering the MS instrument, the reported approach allows rapid solvent exchange for facilitating efficient analyte ionization desired in ESI-MS analysis.
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Affiliation(s)
- Tristan F. Kinde
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Thomas D. Lopez
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Debashis Dutta
- Department of Chemistry, University of Wyoming, Laramie, Wyoming 82071, United States
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Liu Y, Zhang D, Pang S, Liu Y, Shang Y. Size separation of graphene oxide using preparative free-flow electrophoresis. J Sep Sci 2014; 38:157-63. [DOI: 10.1002/jssc.201401000] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 10/17/2014] [Accepted: 10/20/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Yong Liu
- Key Laboratory of Advanced Civil Engineering Materials; School of Materials Science and Engineering; Tongji University; Shanghai P. R. China
| | - Dong Zhang
- Key Laboratory of Advanced Civil Engineering Materials; School of Materials Science and Engineering; Tongji University; Shanghai P. R. China
| | - Shiwu Pang
- Key Laboratory of Advanced Civil Engineering Materials; School of Materials Science and Engineering; Tongji University; Shanghai P. R. China
| | - Yanyun Liu
- Key Laboratory of Advanced Civil Engineering Materials; School of Materials Science and Engineering; Tongji University; Shanghai P. R. China
| | - Yu Shang
- Key Laboratory of Advanced Civil Engineering Materials; School of Materials Science and Engineering; Tongji University; Shanghai P. R. China
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24
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Yan J, Yang CZ, Zhang Q, Liu XP, Kong FZ, Cao CX, Jin XQ. Experimental study on the optimization of general conditions for a free-flow electrophoresis device with a thermoelectric cooler†. J Sep Sci 2014; 37:3555-63. [DOI: 10.1002/jssc.201400770] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/22/2014] [Accepted: 09/04/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Jian Yan
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
- Institute of Refrigeration and Cryogenics; School of Mechanical Engineering; Shanghai Jiao Tong University; Shanghai China
| | - Cheng-Zhang Yang
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Qiang Zhang
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Xiao-Ping Liu
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Fan-Zhi Kong
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Cheng-Xi Cao
- Key State Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai China
| | - Xin-Qiao Jin
- Institute of Refrigeration and Cryogenics; School of Mechanical Engineering; Shanghai Jiao Tong University; Shanghai China
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25
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Yang CZ, Yan J, Zhang Q, Guo CG, Kong FZ, Cao CX, Fan LY, Jin XQ. Negative-pressure-induced collector for a self-balance free-flow electrophoresis device. J Sep Sci 2014; 37:1359-63. [PMID: 24648284 DOI: 10.1002/jssc.201400007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/12/2014] [Accepted: 03/13/2014] [Indexed: 11/10/2022]
Abstract
Uneven flow in free-flow electrophoresis (FFE) with a gravity-induced fraction collector caused by air bubbles in outlets and/or imbalance of the surface tension of collecting tubes would result in a poor separation. To solve these issues, this work describes a novel collector for FFE. The collector is composed of a self-balance unit, multisoft pipe flow controller, fraction collector, and vacuum pump. A negative pressure induced continuous air flow rapidly flowed through the self-balance unit, taking the background electrolyte and samples into the fraction collector. The developed collector has the following advantages: (i) supplying a stable and harmonious hydrodynamic environment in the separation chamber for FFE separation, (ii) effectively preventing background electrolyte and sample flow-back at the outlet of the chamber and improving the resolution, (iii) increasing the preparative scale of the separation, and (iv) simplifying the operation. In addition, the cost of the FFE device was reduced without using a multichannel peristaltic pump for sample collection. Finally, comparative FFE experiments on dyes, proteins, and cells were carried out. It is evident that the new developed collector could overcome the problems inherent in the previous gravity-induced self-balance collector.
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Affiliation(s)
- Cheng-Zhang Yang
- Laboratory of Analytical Biochemistry and Bioseparation, Key State Laboratory of Microbial Metabolism, School of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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26
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Dutta D. A method-of-moments formulation for describing hydrodynamic dispersion of analyte streams in free-flow zone electrophoresis. J Chromatogr A 2014; 1340:134-8. [DOI: 10.1016/j.chroma.2014.03.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Revised: 03/05/2014] [Accepted: 03/05/2014] [Indexed: 01/08/2023]
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27
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Kašička V. Recent developments in capillary and microchip electroseparations of peptides (2011-2013). Electrophoresis 2013; 35:69-95. [PMID: 24255019 DOI: 10.1002/elps.201300331] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/10/2013] [Accepted: 09/10/2013] [Indexed: 01/15/2023]
Abstract
The review presents a comprehensive survey of recent developments and applications of capillary and microchip electroseparation methods (zone electrophoresis, ITP, IEF, affinity electrophoresis, EKC, and electrochromatography) for analysis, isolation, purification, and physicochemical and biochemical characterization of peptides. Advances in the investigation of electromigration properties of peptides, in the methodology of their analysis, including sample preseparation, preconcentration and derivatization, adsorption suppression and EOF control, as well as in detection of peptides, are presented. New developments in particular CE and CEC modes are reported and several types of their applications to peptide analysis are described: conventional qualitative and quantitative analysis, determination in complex (bio)matrices, monitoring of chemical and enzymatical reactions and physical changes, amino acid, sequence and chiral analysis, and peptide mapping of proteins. Some micropreparative peptide separations are shown and capabilities of CE and CEC techniques to provide relevant physicochemical characteristics of peptides are demonstrated.
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Affiliation(s)
- Václav Kašička
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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The potential of electrophoretic sample pretreatment techniques and new instrumentation for bioanalysis, with a focus on peptidomics and metabolomics. Bioanalysis 2013; 5:2785-801. [DOI: 10.4155/bio.13.254] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This Review highlights the potential of new electromigration-based sample pretreatment techniques for bioanalysis. Sample pretreatment is a challenging part of the analytical workflow, especially in the fields of peptidomics and metabolomics, where the analytes are very diverse, both in physicochemical properties and in endogenous concentration. Electromigration-based techniques have several strengths, such as fast selective analyte concentration and that complementary information on the content of a sample can be obtained when compared with more conventional (chromatography-based) techniques. In the past decade, various new electromigration-based sample pretreatment techniques have been developed, and importantly, new instrumental setups. In this Review, we provide an introduction on electromigration and its strengths. Then, selected examples of electromigration-based sample pretreatment techniques and instrumentation are discussed, namely free-flow electrophoresis, isoelectric focusing, isotachophoresis, electrodialysis, electromembrane extraction and electroextraction. Finally, the promising perspectives of electromigration-based sample pretreatment techniques are outlined.
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Smejkal P, Bottenus D, Breadmore MC, Guijt RM, Ivory CF, Foret F, Macka M. Microfluidic isotachophoresis: A review. Electrophoresis 2013; 34:1493-509. [DOI: 10.1002/elps.201300021] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 12/22/2022]
Affiliation(s)
- Petr Smejkal
- ACROSS and School of Chemistry; University of Tasmania; Hobart; Australia
| | - Danny Bottenus
- Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman; WA; USA
| | | | - Rosanne M. Guijt
- ACROSS and School of Pharmacy; University of Tasmania; Hobart; Australia
| | - Cornelius F. Ivory
- Voiland School of Chemical Engineering and Bioengineering; Washington State University; Pullman; WA; USA
| | - František Foret
- Institute of Analytical Chemistry of the Academy of Sciences of the Czech Republic; v.v.i., Brno; Czech Republic
| | - Mirek Macka
- ACROSS and School of Chemistry; University of Tasmania; Hobart; Australia
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30
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Zhang J, Yan J, Li S, Pang B, Guo CG, Cao CX, Jin XQ. Mathematical model and dynamic computer simulation on free flow zone electrophoresis. Analyst 2013; 138:5734-44. [DOI: 10.1039/c3an00834g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Yang JH, Shao J, Wang HY, Dong JY, Fan LY, Cao CX, Xu YQ. Simply enhancing throughput of free-flow electrophoresis via organic-aqueous environment for purification of weak polarity solute of phenazine-1-carboxylic acid in fermentation ofPseudomonassp. M18. Electrophoresis 2012; 33:2925-30. [DOI: 10.1002/elps.201200108] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Revised: 05/04/2012] [Accepted: 06/24/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Jing-Hua Yang
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
| | - Jing Shao
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
| | - Hou-Yu Wang
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
| | - Jing-Yu Dong
- Shanghai Key Laboratory of Functional Materials Chemistry; East China University of Science and Technology; Shanghai; P. R. China
| | - Liu-Yin Fan
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
| | - Cheng-Xi Cao
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
| | - Yu-Quan Xu
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; P. R. China
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Shao J, Fan LY, Cao CX, Huang XQ, Xu YQ. Quantitative investigation of resolution increase of free-flow electrophoresis via simple interval sample injection and separation. Electrophoresis 2012; 33:2065-74. [DOI: 10.1002/elps.201200169] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jing Shao
- Laboratory of Bio-separation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Liu-Yin Fan
- Laboratory of Bio-separation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Cheng-Xi Cao
- Laboratory of Bio-separation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Xian-Qing Huang
- Laboratory of Bio-separation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Yu-Quan Xu
- Laboratory of Bio-separation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
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34
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Gunther NW, Paul M, Nuñez A, Liu Y. pH fractionation and identification of proteins: comparing column chromatofocusing versus liquid isoelectric focusing techniques. J Sep Sci 2012; 35:1399-405. [PMID: 22740249 DOI: 10.1002/jssc.201100865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In proteomic investigations, a number of different separation techniques can be applied to fractionate whole cell proteomes into more manageable fractions for subsequent analysis. In this work, utilizing HPLC and mass spectrometry for protein identification, two different fractionation methods were compared and contrasted to determine the potential of each method for the simple and reproducible fractionation of a bacterial proteome. Column-based chromatofocusing and liquid-based isoelectric focusing both utilized pH gradients to produce similar results in terms of the numbers of proteins successfully identified (402 and 378 proteins) and the consistency of proteins identified from one experiment to the next (<10% change). However, there was limited overlap in the protein sets with <50% of the proteins identified as common between the sets of proteins identified by the different systems. In addition to the numbers of proteins identified and consistency of those identified, the reduced monetary costs of experimentation and increased assay flexibility produced by using isoelectric focusing was considered in order to adopt a system best suited for comparative proteomic projects.
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Affiliation(s)
- Nereus W Gunther
- US Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, PA 19038, USA.
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35
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Pang B, Shao J, Zhang J, Geng JZ, Fan LY, Cao CX, Hou JL. Enhancing separation of histidine from amino acids via free-flow affinity electrophoresis with gravity-induced uniform hydrodynamic flow. Electrophoresis 2012; 33:856-65. [DOI: 10.1002/elps.201100494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Bo Pang
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Jing Shao
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Jie Zhang
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Jia-Zhen Geng
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Liu-Yin Fan
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Cheng-Xi Cao
- Laboratory of Bioseparation and Analytical Biochemistry; State Key Laboratory of Microbial Metabolism; School of Life Science and Biotechnology; Shanghai Jiao Tong University; Shanghai; China
| | - Jing-Li Hou
- Instrumental Analysis Center; Shanghai Jiao Tong University; Shanghai; China
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36
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Gorbatsova J, Borissova M, Kaljurand M. Electrowetting-on-dielectric actuation of droplets with capillary electrophoretic zones for off-line mass spectrometric analysis. J Chromatogr A 2012; 1234:9-15. [DOI: 10.1016/j.chroma.2011.12.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 11/21/2011] [Accepted: 12/16/2011] [Indexed: 01/03/2023]
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37
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Kašička V. Recent developments in CE and CEC of peptides (2009-2011). Electrophoresis 2011; 33:48-73. [DOI: 10.1002/elps.201100419] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 09/19/2011] [Accepted: 09/20/2011] [Indexed: 12/12/2022]
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38
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Geng JZ, Shao J, Yang JH, Pang B, Cao CX, Fan LY. Reassemblable quasi-chip free-flow electrophoresis with simple heating dispersion for rapid micropreparation of trypsin in crude porcine pancreatin. Electrophoresis 2011; 32:3248-56. [DOI: 10.1002/elps.201100358] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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39
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Dong YC, Shao J, Yin XY, Fan LY, Cao CX. Mid-scale free-flow electrophoresis with gravity-induced uniform flow of background buffer in chamber for the separation of cells and proteins. J Sep Sci 2011; 34:1683-91. [DOI: 10.1002/jssc.201100293] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 04/29/2011] [Accepted: 04/29/2011] [Indexed: 01/22/2023]
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40
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Agostino FJ, Evenhuis CJ, Krylov SN. Milli-free flow electrophoresis: I. Fast prototyping of mFFE devices. J Sep Sci 2011; 34:556-64. [DOI: 10.1002/jssc.201000758] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/10/2010] [Accepted: 12/13/2010] [Indexed: 11/06/2022]
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41
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Shao J, Li S, Zhang W, Fan LY, Cao CX, Sun R, Dong YC. Controlling of band width, resolution and sample loading by injection system in a simple preparative free-flow electrophoresis with gratis gravity. J Chromatogr A 2010; 1217:2182-6. [DOI: 10.1016/j.chroma.2010.01.085] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 01/26/2010] [Accepted: 01/29/2010] [Indexed: 11/25/2022]
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42
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Simionato AVC, Carrilho E, Maggi Tavares MF. CE-MS and related techniques as a valuable tool in tumor biomarkers research. Electrophoresis 2010; 31:1214-1226. [DOI: 10.1002/elps.200900671] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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43
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Okhonin V, Evenhuis CJ, Krylov SN. Non-Orthogonal-to-the-Flow Electric Field Improves Resolution in the Orthogonal Direction: Hidden Reserves for Combining Synthesis and Purification in Continuous Flow. Anal Chem 2010; 82:1183-5. [DOI: 10.1021/ac902546y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Victor Okhonin
- Department of Chemistry and Centre for Research on Biomolecular Interactions, York University, Toronto, Ontario M3J 1P3, Canada
| | - Christopher J. Evenhuis
- Department of Chemistry and Centre for Research on Biomolecular Interactions, York University, Toronto, Ontario M3J 1P3, Canada
| | - Sergey N. Krylov
- Department of Chemistry and Centre for Research on Biomolecular Interactions, York University, Toronto, Ontario M3J 1P3, Canada
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