1
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Ishikawa T, Yao H. Amplified Near-IR Fluorescence in Organic Rhodamine-800 Nanoparticles under the Efficient Control of Aggregation-caused Quenching. CHEM LETT 2019. [DOI: 10.1246/cl.190612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Takenori Ishikawa
- Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
| | - Hiroshi Yao
- Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan
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2
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Szarka M, Szigeti M, Guttman A. Imaging Laser-Induced Fluorescence Detection at the Taylor Cone of Electrospray Ionization Mass Spectrometry. Anal Chem 2019; 91:7738-7743. [DOI: 10.1021/acs.analchem.9b01028] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Máte Szarka
- Horváth Csaba Memorial Laboratory of Bioseparation Sciences, Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, 98 Nagyerdei krt, Debrecen 4032, Hungary
| | - Márton Szigeti
- Horváth Csaba Memorial Laboratory of Bioseparation Sciences, Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, 98 Nagyerdei krt, Debrecen 4032, Hungary
- Translational Glycomics Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, 10 Egyetem Street, Veszprem 8200, Hungary
| | - András Guttman
- Horváth Csaba Memorial Laboratory of Bioseparation Sciences, Research Center for Molecular Medicine, Faculty of Medicine, University of Debrecen, 98 Nagyerdei krt, Debrecen 4032, Hungary
- Translational Glycomics Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, 10 Egyetem Street, Veszprem 8200, Hungary
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3
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Organic nanoparticles of an extended π-conjugated styryl dye: Modulation of fluorescence peak energy and intensity in the near-infrared (NIR) region. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.08.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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4
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Derivatisation for separation and detection in capillary electrophoresis (2012-2015). Electrophoresis 2015; 37:45-55. [DOI: 10.1002/elps.201500290] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/27/2015] [Accepted: 07/27/2015] [Indexed: 12/22/2022]
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5
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Zhang XF, Lan L, Chen L, Chen HB, Yang QF, Li Q, Li QL, Sun XR, Tang YL. Spectroscopic Investigation on the Binding of a Cyanine Dye with Transferrin. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3508] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiu-feng Zhang
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Ling Lan
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Lei Chen
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Hong-bo Chen
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Qian-fan Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Qian Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Qi-long Li
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Xiao-ran Sun
- College of Chemical Engineering; North China University of Science and Technology; Tangshan Hebei 063009 China
| | - Ya-lin Tang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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6
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Antibody-free ultra-high performance liquid chromatography/tandem mass spectrometry measurement of angiotensin I and II using magnetic epitope-imprinted polymers. J Chromatogr A 2015; 1411:69-76. [DOI: 10.1016/j.chroma.2015.07.114] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/28/2015] [Accepted: 07/31/2015] [Indexed: 01/12/2023]
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7
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Zhang XF, Chen L, Yang QF, Li Q, Sun XR, Chen HB, Yang G, Tang YL. Study on the interaction of a cyanine dye with human serum transferrin. LUMINESCENCE 2015; 30:1176-83. [DOI: 10.1002/bio.2873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/05/2015] [Accepted: 01/07/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Xiu-feng Zhang
- College of Chemical Engineering; Hebei United University; Tangshan Hebei 063009 China
| | - Lei Chen
- College of Chemical Engineering; Hebei United University; Tangshan Hebei 063009 China
| | - Qian-fan Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Qian Li
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Xiao-ran Sun
- College of Chemical Engineering; Hebei United University; Tangshan Hebei 063009 China
| | - Hong-bo Chen
- College of Chemical Engineering; Hebei United University; Tangshan Hebei 063009 China
| | - Guang Yang
- College of Chemical Engineering; Hebei United University; Tangshan Hebei 063009 China
| | - Ya-lin Tang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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8
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Spectroscopic and molecular modeling study of cyanine dye interacting with human serum transferrin. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Funada T, Hirose T, Tamai N, Yao H. Organic nanoparticles of malachite green with enhanced far-red emission: size-dependence of particle rigidity. Phys Chem Chem Phys 2015; 17:11006-13. [DOI: 10.1039/c5cp00031a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The “rigidity” of malachite green nanoparticles is strongly size-dependent; the smaller the size is, the greater the particle rigidity inside.
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Affiliation(s)
- Tomohito Funada
- Graduate School of Material Science
- University of Hyogo
- Hyogo 678-1297
- Japan
| | - Takuya Hirose
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Naoto Tamai
- Department of Chemistry
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
| | - Hiroshi Yao
- Graduate School of Material Science
- University of Hyogo
- Hyogo 678-1297
- Japan
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10
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Zhang LY, Tu FQ, Guo XF, Wang H, Wang P, Zhang HS. Rapid and sensitive determination of free thiols by capillary zone electrophoresis with near-infrared laser-induced fluorescence detection using a new BODIPY-based probe as labeling reagent. Electrophoresis 2014; 35:2951-8. [DOI: 10.1002/elps.201400203] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/16/2014] [Accepted: 07/18/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Li-Yun Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences, Wuhan University; Wuhan P. R. China
| | - Feng-Qin Tu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences, Wuhan University; Wuhan P. R. China
| | - Xiao-Feng Guo
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences, Wuhan University; Wuhan P. R. China
| | - Hong Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences, Wuhan University; Wuhan P. R. China
| | - Peng Wang
- Hubei Entry Exit Inspect & Quarantine Bur PRC, Ctr Technol; Wuhan P. R. China
| | - Hua-Shan Zhang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); College of Chemistry and Molecular Sciences, Wuhan University; Wuhan P. R. China
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11
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Quirino JP, Kato M. Separation of cationic analytes by nonionic micellar electrokinetic chromatography using polyoxyethylene lauryl ether surfactants with different polyoxyethylene length. J Sep Sci 2014; 37:2613-7. [DOI: 10.1002/jssc.201400500] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/28/2014] [Accepted: 06/30/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Joselito P. Quirino
- GPLLI Program, Graduate School of Pharmaceutical Sciences; The University of Tokyo; Tokyo Japan
- Australian Centre for Research on Separation Science (ACROSS); School of Chemistry; University of Tasmania; Hobart Tasmania Australia
| | - Masaru Kato
- GPLLI Program, Graduate School of Pharmaceutical Sciences; The University of Tokyo; Tokyo Japan
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12
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Yao H, Enseki T. Size-dependent spectral linewidth narrowing of H-bands in organic nanoparticles of pentamethine cyanine dye. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Iizumi Y, Okazaki T, Ikehara Y, Ogura M, Fukata S, Yudasaka M. Immunoassay with single-walled carbon nanotubes as near-infrared fluorescent labels. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7665-7670. [PMID: 23927721 DOI: 10.1021/am401702q] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The intrinsic photoluminescence of single-walled carbon nanotubes (CNTs) in the near-infrared (NIR) above 1000 nm makes them promising candidates for biological probes owing to low interference by bioorganic molecules and deep tissue penetration. We here demonstrate an immunoassay by using a NIR CNT labels conjugated to immunoglobulin G (IgG) antibodies. Most of the CNT-conjugated IgG was successfully immunoprecipitated with protein G-attached magnetic beads and eluted from them, which was confirmed by the NIR emission of the conjugated CNTs at 1000-1200 nm. The photoluminescence intensity of the CNT labels was strong enough to detect antigens at 600 pM by our simple procedures.
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Affiliation(s)
- Yoko Iizumi
- Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8565, Japan
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14
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He X, Li H, Liu Y, Huang H, Kang Z, Lee ST. Water soluble carbon nanoparticles: Hydrothermal synthesis and excellent photoluminescence properties. Colloids Surf B Biointerfaces 2011; 87:326-32. [DOI: 10.1016/j.colsurfb.2011.05.036] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 05/17/2011] [Accepted: 05/20/2011] [Indexed: 10/18/2022]
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15
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Zhang Y, Du H, Tang Y, Xu G, Yan W. Spectroscopic investigation on the interaction of J-aggregate with human serum albumin. Biophys Chem 2007; 128:197-203. [PMID: 17482339 DOI: 10.1016/j.bpc.2007.04.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2007] [Revised: 04/12/2007] [Accepted: 04/14/2007] [Indexed: 11/27/2022]
Abstract
The interactions of three cyanine dyes, which exhibit different meso substituent in polymethine chain, with human serum albumin (HSA) have been investigated by the means of absorption, fluorescence and circular dichroism (CD) spectra. In phosphate buffer solution (PBS), the mentioned dyes exist not as isolated monomers but rather in the formation of J-aggregation. In the presence of HSA, the absorption and fluorescence emission spectra indicated that the J-aggregation was decomposed to monomer because of the strong affinity between dye molecules and HSA. Besides the association of cyanine dyes with HSA, binding to HSA gave rise to the J-aggregation CD signals. The meso substituent in the polymethine plays an important role in the interaction of HSA and the J-aggregation. Spectral studies showed that the dye bound with HSA in a 1:1 formation. The apparent constant (K(a)) value was roughly identified by analysis of the corresponding fluorescence data at various HSA concentrations. The higher affinity of the molecule with meso phenyl towards HSA with respect to molecules with meso ethyl or methyl can be attributed to the arrangement of molecules in J-aggregation and the hydrophobic force between the molecules and HSA.
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Affiliation(s)
- Yazhou Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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16
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Tseng WL, Chiu TC, Weng JM, Chang HT. ANALYSIS OF ALBUMINS, USING ALBUMIN BLUE 580, BY CAPILLARY ELECTROPHORESIS AND LASER-INDUCED FLUORESCENCE. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100107350] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Wei-Lung Tseng
- a Department of Chemistry , National Taiwan University , Taipei , Taiwan, R. O. C
| | - Tai-Chia Chiu
- a Department of Chemistry , National Taiwan University , Taipei , Taiwan, R. O. C
| | - Jang-Mao Weng
- a Department of Chemistry , National Taiwan University , Taipei , Taiwan, R. O. C
| | - Huan-Tsung Chang
- b Department of Chemistry , National Taiwan University , Taipei , Taiwan, R. O. C
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17
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Abstract
CE- and microchip-based separations coupled with LIF are powerful tools for the separation, detection and determination of biomolecules. CE with certain configurations has the potential to detect a small number of molecules or even a single molecule, thanks to the high spatial coherence of the laser source which permits the excitation of very small sample volumes with high efficiency. This review article discusses the use of LIF detection for the analysis of peptides and proteins in CE. The most common laser sources, basic instrumentation, derivatization modes and set-ups are briefly presented and special attention is paid to the different fluorogenic agents used for pre-, on- and postcapillary derivatization of the functional groups of these compounds. A table summarizing major applications of these derivatization reactions to the analysis of peptides and proteins in CE-LIF and a bibliography with 184 references are provided which covers papers published to the end of 2005.
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18
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Lacroix M, Poinsot V, Fournier C, Couderc F. Laser-induced fluorescence detection schemes for the analysis of proteins and peptides using capillary electrophoresis. Electrophoresis 2005; 26:2608-21. [PMID: 15948219 DOI: 10.1002/elps.200410414] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Over the past few years, a large number of studies have been prepared that describe the analysis of peptides and proteins using capillary electrophoresis (CE) and laser-induced fluorescence (LIF). These studies have focused on two general goals: (i) development of automatic, selective and quick separation and detection of mixtures of peptides or proteins; (ii) generation of new methods of quantitation for very low concentrations (nm and subnanomolar) of peptides. These two goals are attained with the use of covalent labelling reactions using a variety of dyes that can be readily excited by the radiation from a commonly available laser or via the use of noncovalent labelling (immunoassay using a labelled antibody or antigen or noncovalent dye interactions). In this review article, we summarize the works which were performed for protein and peptide analysis via CE-LIF.
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Affiliation(s)
- Marlene Lacroix
- Laboratoire des IMRCP, UMR 5623, ERT 1046, Université Paul Sabatier, Toulouse, France
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19
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Wang H, Li WR, Lu Y, Fu NN, Zhang HS. Spectrophotometric determination of DNA using a near infrared probe 1,1'-disulfobutyl-3,3,3',3'-tetramethylindotricarbocyanine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:2103-7. [PMID: 15911398 DOI: 10.1016/j.saa.2004.07.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2004] [Accepted: 07/27/2004] [Indexed: 05/02/2023]
Abstract
A direct spectrophotometric determination of DNA in solution has been developed using a near infrared probe, 1,1'-disulfobutyl-3,3,3',3'-tetramethylindotricarbocyanine (DSTCY). In pH = 7.5 Tris-HCl buffer, the reaction of DSTCY with DNA was complete within 10 min at room temperature in the presence of cetyltrimethylammonium bromide (CTAB), which leaded to a sharp increase of the absorbance at 474 nm. The concentration of DNA can be determined in such wavelength with the linear range of 0.5-8.0 microg ml(-1) and the detection limit of 45 ng ml(-1).
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Affiliation(s)
- Hong Wang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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20
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Patonay G, Kim JS, Kodagahally R, Strekowski L. Spectroscopic study of a novel bis(heptamethine cyanine) dye and its interaction with human serum albumin. APPLIED SPECTROSCOPY 2005; 59:682-90. [PMID: 15969815 DOI: 10.1366/0003702053945976] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A newly synthesized near-infrared (NIR) bis(heptamethine cyanine) dye 7 was evaluated for its utility as a non-covalent label for proteins. This dye forms inter- and intramolecular H-aggregates in polar solvents, even at very low concentrations. The intramolecular dimeric form of the dye can be described as a clam-shell complex with two interacting hydrophobic carbocyanine moieties. In this intramolecular H-aggregate, the chromophore has a low extinction coefficient and low fluorescence quantum yield. In aqueous solution, in the absence of human serum albumin (HSA), dye 7 has characteristic absorption bands at 792 and 435 nm, and its fluorescent emission is significantly diminished in comparison to that in methanol or when compared to its monomeric equivalent 5. Dye 7 seems to be more advantageous than its monomeric counterpart 5 as a non-covalent label for biomolecules. Upon addition of HSA, the H and D bands are decreased and the monomeric band is increased, with concomitant increase in fluorescence intensity, suggesting that clam-shell H-aggregates open up in the complex with HSA. The binding stoichiometry is 1:1. The main advantage of this dimeric dye as a non-covalent label is that the free dye has negligible fluorescence.
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Affiliation(s)
- Gabor Patonay
- Department of Chemistry, University Plaza, Georgia State University, Atlanta, Georgia 30303, USA
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21
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Sun C, Yang J, Li L, Wu X, Liu Y, Liu S. Advances in the study of luminescence probes for proteins. J Chromatogr B Analyt Technol Biomed Life Sci 2004; 803:173-90. [PMID: 15063324 DOI: 10.1016/j.jchromb.2003.12.039] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2003] [Accepted: 12/16/2003] [Indexed: 11/30/2022]
Abstract
Spectral probes (or labels) have been widely used for the investigation and determination of proteins and have made considerable progress. Traditional luminescence probes include fluorescent derivatizing reagents, fluorescent probes and chemiluminescence probes which continue to develop. Of them, near infrared (NIR) fluorescent probes are especially suitable for the determination of biomolecules including proteins, so their development has been rapid. Novel luminescence probes (such as nanoparticle probes and molecular beacons) and resonance light scattering probes recently appeared in the literature. Preliminary results indicate that they possess great potential for ultrasensitive protein detection. This review summarizes recent developments of the above-mentioned probes for proteins and 195 references are cited.
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Affiliation(s)
- Changxia Sun
- Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Department of Chemistry, Shandong University, Jinan 250100, PR China
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22
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Monton MRN, Terabe S. Field-enhanced sample injection for high-sensitivity analysis of peptides and proteins in capillary electrophoresis–mass spectrometry. J Chromatogr A 2004; 1032:203-11. [PMID: 15065797 DOI: 10.1016/j.chroma.2003.10.038] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Field-enhanced sample injection (FESI) was used to improve the concentration sensitivity of a capillary electrophoresis (CE)-mass spectrometry (MS) system with sheath flow configuration. Using some bioactive peptides, more than 3000-fold improvement in signal was obtained, permitting analysis in the low nM (fmol/microl) levels. The system was further evaluated for analysis of complex peptide mixtures by using low concentration tryptic digests of standard proteins. Rapid identification of the original protein was obtained by database searching using the observed molecular masses of the peptides, and by comparison of actual MS-MS spectra of selected peptides with the predicted fragmentation patterns.
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Affiliation(s)
- Maria Rowena N Monton
- Graduate School of Science, Himeji Institute of Technology, Kamigori, Hyogo 678-1297, Japan.
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23
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Chapter 15 Electrophoresis of proteins and peptides. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/s0301-4770(04)80028-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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24
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Evans L. Separation and quantitation of components in FD&C Red No. 3 using capillary electrophoresis. J Chromatogr A 2003; 991:275-80. [PMID: 12741605 DOI: 10.1016/s0021-9673(03)00244-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The use of capillary electrophoresis as a technique to separate and quantitate components of FD&C Red No. 3 (erythrosine, color index No. 45430) is described. The fluorescein isomers, 2',4',5'-triiodofluorescein (2,4,5-I3F) and 2',4',7'-triiodofluorescein (2,4,7-I3F), the most abundant by-products formed during the preparation of the dye, were selected for quantitation studies. The separation of other lower halogenated impurities was also demonstrated. Electrophoretic mobility of the compounds was achieved in a 50 mM borate, 25 mM sodium dodecyl sulfate buffer at pH 9.3. The limits of quantitation were found to be 0.15% (w/w) (2,4,5-I3F) and 0.14% (w/w) (2,4,7-I3F) (relative to the mass of FD&C Red No. 3). The method is linear from 0.08 to 20.0% (w/w) for 2,4,5-I3F and between 0.06 and 17.0% (w/w) for 2,4,7-13F. In addition, relative standard deviations of 2.03 and 5.11% were determined from precision studies in the repeat analysis of FD&C Red No. 3 for 2,4,5-I3F and 2,4,7-I3F, respectively. Overall, the CE method produced data in excellent agreement with the reference HPLC method, used considerably less solvent and sample, generated less waste and was found to be considerably more cost efficient.
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Affiliation(s)
- Lawrence Evans
- US Food and Drug Administration, Colors Technology Branch, 5100 Paintbranch Parkway, HFS-126 College Park, MD 20740, USA.
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25
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Fukushima T, Usui N, Santa T, Imai K. Recent progress in derivatization methods for LC and CE analysis. J Pharm Biomed Anal 2003; 30:1655-87. [PMID: 12485710 DOI: 10.1016/s0731-7085(02)00511-3] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The derivatization procedure with a suitable fluorescence or chemiluminescence reagent is performed for the purpose of increasing the detection sensitivity and selectivity, in high-performance liquid chromatography (HPLC) and/or capillary electrophoresis (CE). In this article, recent derivatization methods and their applications to biosamples are described. In HPLC, femto mol order of mass detection limits are obtained by derivatization. Regarding the fluorescence reagents, the use of water-soluble reagents has been effective to avoid an undesired adsorption in the process of determination of peptides. In CE, the advantages of having extremely low mass detection limits (ranging from atto to yocto mol level) and requiring only a very short analysis time (less than a few minutes) are made possible by using laser-induced fluorescence or near infra-red detections.
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Affiliation(s)
- Takeshi Fukushima
- Laboratory of Bio-Analytical Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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26
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Sowell J, Strekowski L, Patonay G. DNA and protein applications of near-infrared dyes. JOURNAL OF BIOMEDICAL OPTICS 2002; 7:571-575. [PMID: 12421123 DOI: 10.1117/1.1502262] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2002] [Revised: 05/17/2002] [Accepted: 06/05/2002] [Indexed: 05/24/2023]
Abstract
The near-infrared region of the spectrum (650-1100 nm) offers distinct advantages over the traditional UV/vis region for spectroscopic measurements. In the past, the lack of commercially available equipment capable of working in the near infrared limited the utility of near-infrared techniques. However, since the advent of photodiodes and semiconductor lasers, much progress has been made in the development of near-infrared techniques. This paper discusses the use of near-infrared dyes used in DNA and protein applications.
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Affiliation(s)
- John Sowell
- Georgia State University, Department of Chemistry, University Plaza, Atlanta, Georgia 30303, USA
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Tran NT, Cabanes-Macheteau M, Taverna M. Chapter 20 Analysis of glycoproteins and their glycopeptide and glycan fragments by electrophoresis and capillary electrophoresis. JOURNAL OF CHROMATOGRAPHY LIBRARY 2002. [DOI: 10.1016/s0301-4770(02)80045-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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28
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Abstract
The article gives a comprehensive review on the recent developments in the applications of high-performance capillary electromigration methods, including zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography and electrochromatography, to analysis, preparation and physicochemical characterization of peptides. The article presents new approaches to the theoretical description and experimental verification of electromigration behavior of peptides, and covers the methodological aspects of capillary electroseparations of peptides, such as strategy and rules for the rational selection of separation mode and experimental conditions, sample treatment, suppression of peptide adsorption to the inner capillary wall, new developments in individual separation modes and new designs of detection systems. Several types of applications of capillary electromigration methods to peptide analysis are presented: conventional qualitative and quantitative analysis for determination of purity, determination in biomatrices, monitoring of physical and chemical changes and enzymatic conversions, amino acid and sequence analysis and peptide mapping of proteins. Some examples of micropreparative peptide separations are given and capabilities of capillary electromigration techniques to provide important physicochemical characteristics of peptides are demonstrated.
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Affiliation(s)
- V Kasicka
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague.
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29
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Righetti PG. Capillary electrophoretic analysis of proteins and peptides of biomedical and pharmacological interest. Biopharm Drug Dispos 2001; 22:337-51. [PMID: 11835253 DOI: 10.1002/bdd.276] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Capillary electrophoresis (CE) is an automated approach to electrokinetic separations that has had a deep impact in all fields of life sciences, including biomedical and biotechnological research and clinical and forensic practice. The present review highlights aspects of peptides and proteins separations, with particular emphasis on macromolecular analytes of biomedical interest. Among the various CE techniques available, a novel methodology is here illustrated consisting in separations in acidic, isoelectric buffers, which have the advantage of protonating the silica wall, thus minimizing interactions of proteinaceous material with the siliceous surface, while allowing delivery of high voltage gradients, due to their low conductivities. The review ends with applications of CE to the analysis of folding/unfolding/refolding/misfolding of proteins, a field which has deep implications in the biomedical arena, since it is connected to a host of disorders, such as prion protein diseases.
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Affiliation(s)
- P G Righetti
- Department of Agricultural and Industrial Biotechnologies, University of Verona, Strada Le Grazie No. 15, 37134 Verona, Italy.
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Sowell J, Mason JC, Strekowski L, Patonay G. Binding constant determination of drugs toward subdomain IIIA of human serum albumin by near-infrared dye-displacement capillary electrophoresis. Electrophoresis 2001; 22:2512-7. [PMID: 11519955 DOI: 10.1002/1522-2683(200107)22:12<2512::aid-elps2512>3.0.co;2-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Drug binding to serum albumin influences several important pharmacological properties such as toxicity, solubility, activity, distribution, and excretion. It is therefore of interest to have methodologies that allow for the determination of drug-albumin affinity constants while simultaneously providing information on the location of the drug binding site. In the present work we describe a method for the determination of binding constants of drugs known to bind to subdomain IIIA of serum albumin. Drugs used in the study were ketoprofen, ibuprofen, quinidine, naproxen, imipramine, and clofibrate. Binding constants of the drugs were determined by near-infrared dye-displacement capillary electrophoresis. The dye-displacement technique uses a competitive-type interaction between the drug of interest and a dye probe to arrive at a binding constant. A heptamethine cyanine dye was used as a probe for drug binding at subdomain IIIA of serum albumin. The utility of the dye as a noncovalent label for serum albumin was investigated. Additionally, the ability of the method to illustrate enantioselective binding is shown. The dye displacement technique has advantages over current electrophoresis-based techniques in that it is faster and uses less reagent.
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Affiliation(s)
- J Sowell
- Department of Chemistry, Georgia State University, Atlanta, USA
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31
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Sowell J, Agnew-Heard KA, Mason JC, Mama C, Strekowski L, Patonay G. Use of non-covalent labeling in illustrating ligand binding to human serum albumin via affinity capillary electrophoresis with near-infrared laser induced fluorescence detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 755:91-9. [PMID: 11393738 DOI: 10.1016/s0378-4347(01)00035-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This paper demonstrates the use of a near-infrared (NIR) dye as a non-covalent label for human serum albumin (HSA). The dye is a water soluble, heptamethine cyanine dye. The utility of the dye as a tracer illustrating the binding of various drugs to HSA is demonstrated via affinity capillary electrophoresis with near-infrared laser-induced fluorescence detection (ACE-NIR-LIF). Additionally, the factors affecting the separation of relevant species were investigated. The change in quantum yield of the dye upon complexation with HSA was calculated. Spectrophotometric measurements were conducted to study the stoichiometry of the dye albumin complex.
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Affiliation(s)
- J Sowell
- Department of Chemistry, Georgia State University, Atlanta 30303, USA
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32
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Sowell J, Parihar R, Patonay G. Capillary electrophoresis-based immunoassay for insulin antibodies with near-infrared laser induced fluorescence detection. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 752:1-8. [PMID: 11254183 DOI: 10.1016/s0378-4347(00)00508-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A noncompetitive capillary electrophoresis (CE)-based immunoassay with near-infrared laser induced fluorescence detection (NIR-LIF) for insulin antibodies has been developed. In the assay, insulin was derivatized with a NIR fluorescent dye (NN382; LI-COR). Insulin antibodies were detected via the formation of an immunocomplex. Parameters affecting the separation such as pH, voltage and ionic strength were investigated. Furthermore, it was found that increasing the ramp time of the applied voltage improved the detection limit of the assay by an order of magnitude. The detection limit of the assay was 1.1 nM.
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Affiliation(s)
- J Sowell
- Department of Chemistry, Georgia State University, Atlanta 30303, USA.
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Abstract
This survey gives an overview of recent derivatization protocols, starting from 1996, in combination with capillary electrophoresis (CE). Derivatization is mainly used for enhancing the detection sensitivity of CE, especially in combination with laser-induced fluorescence. Derivatization procedures are classified in tables in pre-, on- and postcapillary arrangements and, more specifically, arranged into functional groups being derivatized. The amine and reducing ends of saccharides are reported most frequently, but examples are also given for derivatization of thiols, hydroxyl, carboxylic, and carbonyl groups, and inorganic ions. Other reasons for derivatization concern indirect chiral separations, enhancing electrospray characteristics, or incorporation of a suitable charge into the analytes. Special attention is paid to the increasing field of research using on-line precapillary derivatization with CE and microdialysis for in vivo monitoring of neurotransmitter concentrations. The on-capillary derivatization can be divided in several approaches, such as the at-inlet, zone-passing and throughout method. The postcapillary mode is represented by gap designs, and membrane reactors, but especially the combination of separation, derivatization and detection on a chip is a new emerging field of research. This review, which can be seen as a sequel to our earlier reported review covering the years 1991-1995, gives an impression of current derivatization applications and highlights new developments in this field.
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Affiliation(s)
- J C Waterval
- Universiteit Utrecht, Faculty of Pharmacy, The Netherlands
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Tseng WL, Chang HT. On-line concentration and separation of proteins by capillary electrophoresis using polymer solutions. Anal Chem 2000; 72:4805-11. [PMID: 11055693 DOI: 10.1021/ac0004613] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Proteins were separated in 0.6% poly(ethylene oxide) (PEO) solutions using a capillary filled with buffers prior to analysis and were detected by laser-induced native fluorescence using a pulsed Nd:YAG laser. PEO solutions entered the capillary by electroosmotic flow (EOF) during the separation. The composition and concentration of the buffer affected the adsorption of PEO molecules on the capillary surface and, consequently caused changes in the EOF. Short separation times (< 7 min) were achieved on a sample solution of five proteins in a 0.6% PEO solution containing 5 microg/mL ethidium bromide using a capillary pre-filled with 100 mM TRIS-borate (TB) buffers (pH 10,0). We also extended this method for on-line concentration and separation of proteins. Proteins dissolved in low-conductivity media stacked in both TB buffers and in PEO solutions. The peak height was proportional to the injection volume up to 2.1 microL using an 80-cm capillary filled with 400 mM TB buffers. Using large injection volumes (2.1 microL), we achieved a limit of detection (S/N = 3) of 31 pM for carbonic anhydrase, which was a 1696-fold sensitivity enhancement compared to a conventional injection method (1 kV for 10 s). In high-conductivity media (urine matrix), stacking occurred at the boundary between the sample zone and PEO solutions. A urine sample without any pretreatment was analyzed, and after stacking, several peaks were detected. Spiking the urine sample with human serum albumin (HSA) affected the fluorescent intensity of some analytes as a result of interaction with HSA.
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Affiliation(s)
- W L Tseng
- Department of Chemistry, National Taiwan University, Taipei
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Oldham PB, McCarroll ME, McGown LB, Warner IM. Molecular fluorescence, phosphorescence, and chemiluminescence spectrometry. Anal Chem 2000; 72:197R-209R. [PMID: 10882209 DOI: 10.1021/a1000017p] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- P B Oldham
- Department of Chemistry, Mississippi State University 39762, USA
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Affiliation(s)
- S N Krylov
- Department of Chemistry, University of Alberta, Edmonton, Canada
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37
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Abstract
As capillary electrophoresis continues to focus on miniaturization, either through reducing column dimensions or situating entire electrophoresis systems on planar chips, advances in detection become necessary to meet the challenges posed by these electrophoresis platforms. The challenges result from the fact that miniaturization requires smaller load volumes, demanding highly sensitive detection. In addition, many times multiple targets must be analyzed simultaneously (multiplexed applications), further complicating detection. Near-infrared (NIR) fluorescence offers an attractive alternative to visible fluorescence for critical applications in capillary electrophoresis due to the impressive limits of detection that can be generated, in part resulting from the low background levels that are observed in the NIR. Advances in instrumentation and fluorogenic labels appropriate for NIR monitoring have led to a growing number of examples of the use of NIR fluorescence in capillary electrophoresis. In this review, we will cover instrumental components used to construct ultrasensitive NIR fluorescence detectors, including light sources and photon transducers. In addition, we will discuss various types of labeling dyes appropriate for NIR fluorescence and finally, we will present several applications that have used NIR fluorescence in capillary electrophoresis, especially for DNA sequencing and fragment analysis.
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Affiliation(s)
- S McWhorter
- Louisiana State University, Department of Chemistry, Baton Rouge 70803-1804, USA
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38
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Abstract
This article gives a review of the recent developments in capillary electrophoresis (CE) of peptides. New approaches to the theoretical description of electromigration behavior of peptides are described, and methodological aspects of CE separations of peptides such as selection of separation conditions, sample treatment, suppression of peptide adsorption to the capillary wall and specificities of CE separation modes are discussed. Progress in application of high performance detection schemes, namely laser-induced fluorescence and mass spectrometry, in peptide separations by CE is presented. Applications of different CE techniques, zone electrophoresis, isotachophoresis, isoelectric focusing, affinity electrophoresis, electrokinetic chromatography and electrochromatography to peptide analysis, preparation and physicochemical characterization are demonstrated.
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Affiliation(s)
- V Kasicka
- Institute for Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague.
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