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Shinomiya K, Tokura K, Hashimoto T, Watanabe R, Takeda T, Zaima K, Ito Y. Partition Efficiency of Eccentric Coil for Countercurrent Chromatographic Separation of Proteins Using Small-scale Cross-axis Coil Planet Centrifuge with Circular and Elliptic Cylindrical Columns. ANAL SCI 2021; 37:359-365. [PMID: 33100306 DOI: 10.2116/analsci.20p292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The partition efficiency of the double-spaced coil for eccentric and toroidal coils on countercurrent chromatographic separation of proteins was evaluated using the small-scale cross-axis coil planet centrifuge (CPC) equipped with circular and elliptic cylindrical columns. Standard cytochrome c, myoglobin and lysozyme samples were used for separation with the 12.5% (w/w) polyethylene glycol 1000 and 12.5% (w/w) dibasic potassium phosphate system. In the circular column, the double-spaced eccentric coil yielded better peak resolution than the double-spaced toroidal coil, and the double-spaced eccentric coil yielded better peak resolution than the single-spaced eccentric coil. In the elliptic column, the double-spaced eccentric coil also produced better peak resolution than the double-spaced toroidal coil, but the single-spaced eccentric coil yielded better peak resolution than the double-spaced eccentric coil. The overall results indicated that the double-spaced eccentric coil for the circular column and the single-spaced eccentric coil for the elliptic column yielded better protein separation using the small-scale cross-axis CPC with aqueous two-phase solvent systems.
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Affiliation(s)
| | - Koji Tokura
- College of Science and Technology, Nihon University
| | | | | | | | | | - Yoichiro Ito
- Laboratory of Bioseparation Technology, Biochemistry and Biophysics Center, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health
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Shinomiya K, Zaima K, Yasue M, Honda R, Sakuma Y, Harikai N, Tokura K, Ito Y. Partition efficiencies of three different coiled columns for the coil satellite centrifuge at higher rotation speed combinations. J Chromatogr A 2019; 1596:134-141. [PMID: 30862407 DOI: 10.1016/j.chroma.2019.03.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/05/2019] [Accepted: 03/05/2019] [Indexed: 11/19/2022]
Abstract
The partition efficiencies of three different coiled columns, conventional multilayer coiled column, eccentric coiled column and toroidal coiled column, were evaluated by the separation of 4-methylumbelliferyl sugar derivatives using the coil satellite centrifuge (CSC) with an organic-aqueous two-phase solvent system composed of ethyl acetate/1-butanol/water. The CSC apparatus was reinforced the planet axis to maintain the stable satellite motion, which was completed by combining the rotation of three axes including the sun axis (the angular velocity, ω1), the planet axis (ω2) and the satellite axis (ω3) under the relation at ω1 = ω2 + ω3. In the present study, four different rotation speed combination types were used for the separation at the ratio (ω1, ω2, ω3) = I. (300, 150, 150), II. (300, 100, 200), III. (300, 147, 153) and IV. (300, 200, 100 rpm) under different revolution speeds of ω1 = 300, 400 and 500 rpm. In the conventional multilayer coiled column with the upper mobile phase, the rotation speed combination type II yielded the best peak resolution while the rotation speed combination types III and IV had extremely low stationary phase retention even at higher revolution speeds. This inconvenience was eliminated by using the eccentric and the toroidal coiled column. The rotation speed combination type II for the eccentric coiled column and the type IV for the toroidal coiled column produced the best separation in both the upper and the lower mobile phases among four different rotation speed combination types. The overall results indicated that better peak resolution was obtained by the eccentric coiled column than by the toroidal coiled column except for the separation with the upper mobile phase at the low revolution speed.
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Affiliation(s)
- Kazufusa Shinomiya
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan.
| | - Kazumasa Zaima
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Miho Yasue
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Rika Honda
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Yoshiyuki Sakuma
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Naoki Harikai
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Koji Tokura
- College of Science and Technology, Nihon University, 7-24-1, Narashinodai, Funabashi-shi, Chiba 274-8501, Japan
| | - Yoichiro Ito
- Laboratory of Bioseparation Technology, Biochemistry and Biophysics Center, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, 10 Center Drive, MSC 1762, Building 10, Room 5D18, Bethesda, MD 20892-1762, USA
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WANG GH, HUANG XY, DUAN WD, QUAN KJ, WANG BP, FAN RN, DI DL. Advances in Technology of Countercurrent Chromatography for Separation of Protein and Peptide. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2016. [DOI: 10.1016/s1872-2040(16)60965-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Shinomiya K, Umezawa M, Seki M, Nitta J, Zaima K, Harikai N, Ito Y. Improved Separations of Proteins and Sugar Derivatives Using the Small-Scale Cross-Axis Coil Planet Centrifuge with Locular Multilayer Coiled Columns. SEPARATIONS 2016; 3. [PMID: 27891507 DOI: 10.3390/separations3040029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
1 BACKGROUND Countercurrent chromatography (CCC) is liquid-liquid partition chromatography without using a solid support matrix. This technique requires further improvement of partition efficiency and shortening theseparation time. 2 METHODS The locular multilayer coils modified with and without mixer glass beads were developed for the separation of proteins and 4-methylumbelliferyl (MU) sugar derivatives using the small-scale cross-axis coil planet centrifuge. 3 RESULTS Proteins were well separated from each other and the separation was improved at a low flow rate of the mobile phase. On the other hand, 4-MU sugar derivatives were sufficiently resolved with short separation time at a highflow rate of the mobile phase under satisfactory stationary phase retention. 4 CONCLUSION Effective separations were achieved using the locular multilayer coil for proteins with aqueous-aqueous polymer phase systems and for 4-MU sugar derivatives with organic-aqueous two-phase solvent systems by inserting a glass bead into each locule.
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Affiliation(s)
- Kazufusa Shinomiya
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Motoki Umezawa
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Manami Seki
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Jun Nitta
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Kazumasa Zaima
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Naoki Harikai
- School of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
| | - Yoichiro Ito
- Laboratory of Bioseparation Technology, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, 10 Center Drive, Building 10, Room 8N230, Bethesda, MD 20892-1762, USA
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Song H, Lin J, Zhu X, Chen Q. Developments in high-speed countercurrent chromatography and its applications in the separation of terpenoids and saponins. J Sep Sci 2016; 39:1574-91. [DOI: 10.1002/jssc.201501199] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 02/13/2016] [Accepted: 02/14/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Hua Song
- Department of Pharmacy, School of Pharmaceutical Science; Xiamen University; Xiamen China
| | - Jianhong Lin
- Department of Pharmacy, School of Pharmaceutical Science; Xiamen University; Xiamen China
| | - Xuan Zhu
- Department of Pharmacy, School of Pharmaceutical Science; Xiamen University; Xiamen China
| | - Qing Chen
- Department of Pharmacy, School of Pharmaceutical Science; Xiamen University; Xiamen China
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Guan YH, van den Heuvel R. The three-dimensional model for helical columns on type-J synchronous counter-current chromatography. J Chromatogr A 2011; 1218:5108-14. [PMID: 21684548 DOI: 10.1016/j.chroma.2011.05.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Accepted: 05/19/2011] [Indexed: 11/17/2022]
Abstract
Unlike the existing 2-D pseudo-ring model for helical columns undergoing synchronous type-J planetary motion of counter-current chromatograph (CCC), the 3-D "helix" model developed in this work shows that there is a second normal force (i.e. the binormal force) applied virtually in the axial direction of the helical column. This force alternates in the two opposite directions and intensifies phase mixing with increasing the helix angle. On the contrary, the 2-D spiral column operated on the same CCC device lacks this third-dimensional mixing force. The (principal) normal force quantified by this "helix" model has been the same as that by the pseudo-ring model. With β>0.25, this normal centrifugal force has been one-directional and fluctuates cyclically. Different to the spiral column, this "helix" model shows that the centrifugal force (i.e. the hydrostatic force) does not contribute to stationary phase retention in the helical column. Between the popular helical columns and the emerging spiral columns for type-J synchronous CCC, this work has thus illustrated that the former is associated with better phase mixing yet poor retention for the stationary phase whereas the latter has potential for better retention for the stationary phase yet poor phase mixing. The methodology developed in this work may be regarded as a new platform for designing optimised CCC columns for analytical and engineering applications.
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Affiliation(s)
- Y H Guan
- Brunel Institute for Bioengineering, Brunel University West London, Uxbridge, Middlesex UB8 3PH, UK.
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Scale-up of protein purifications using aqueous two-phase systems: Comparing multilayer toroidal coil chromatography with centrifugal partition chromatography. J Chromatogr A 2011; 1218:5527-30. [DOI: 10.1016/j.chroma.2011.04.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 04/04/2011] [Accepted: 04/06/2011] [Indexed: 11/20/2022]
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Shinomiya K, Kobayashi H, Inokuchi N, Nakagomi K, Ito Y. Partition Efficiency of High-Pitch Locular Multilayer Coil for Countercurrent Chromatographic Separation of Proteins Using Small-Scale Cross-Axis Coil Planet Centrifuge and Application to Purification of Various Collagenases with Aqueous-Aqueous Polymer Phase Systems. J LIQ CHROMATOGR R T 2011; 34:182-194. [PMID: 21869859 DOI: 10.1080/10826076.2011.546151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Partition efficiency of the high-pitch locular multilayer coil was evaluated in countercurrent chromatographic (CCC) separation of proteins with an aqueous-aqueous polymer phase system using the small-scale cross-axis coil planet centrifuge (X-axis CPC) fabricated in our laboratory. The separation column was specially made by high-pitch (ca 5 cm) winding of 1.0 mm I.D., 2.0 mm O.D. locular tubing compressed at 2 cm intervals with a total capacity of 29.5 mL. The protein separation was performed using a set of stable proteins including cytochrome C, myoglobin, and lysozyme with the 12.5% (w/w) polyethylene glycol (PEG) 1000 and 12.5% (w/w) dibasic potassium phosphate system (pH 9.2) under 1000 rpm of column revolution. This high-pitch locular tubing yielded substantially increased stationary phase retention than the normal locular tubing for both lower and upper mobile phases. In order to demonstrate the capability of the high-pitch locular tubing, the purification of collagenase from the crude commercial sample was carried out using an aqueous-aqueous polymer phase system. Using the 16.0% (w/w) PEG 1000 - 6.3% (w/w) dibasic potassium phosphate - 6.3% (w/w) monobasic potassium phosphate system (pH 6.6), collagenase I, II, V and X derived from Clostridium hystolyticum were separated from other proteins and colored small molecular weight compounds present in the crude commercial sample, while collagenase N-2 and S-1 from Streptomyces parvulus subsp. citrinus were eluted with impurities at the solvent front with the upper phase. The collagenase from C. hystolyticum retained its enzymatic activity in the purified fractions. The overall results demonstrated that the high-pitch locular multilayer coil is effectively used for the CCC purification of bioactive compounds without loss of their enzymatic activities.
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Guan Y, Fisher D, Sutherland I. Protein separation using toroidal columns by type-J synchronous counter-current chromatography towards preparative separation. J Chromatogr A 2010; 1217:3525-30. [DOI: 10.1016/j.chroma.2010.03.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 03/13/2010] [Accepted: 03/22/2010] [Indexed: 11/29/2022]
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Shinomiya K, Ito Y. Effects of the Planetary Motion of a Coiled Column on Protein Separation by the Nonsynchronous Coil Planet Centrifuge. J LIQ CHROMATOGR R T 2009. [DOI: 10.1081/jlc-200034913] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kazufusa Shinomiya
- a College of Pharmacy , Nihon University , 7‐7‐1 Narashinodai, Funabashi‐shi , Chiba , 274‐8555 , Japan
| | - Yoichiro Ito
- b Laboratory of Biophysical Chemistry, National Heart, Lung, and Blood Institute , National Institutes of Health , Bethesda , Maryland , USA
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Shinomiya K, Ito Y. PARTITION EFFICIENCY OF NEWLY DESIGNED LOCULAR MULTILAYER COIL FOR COUNTERCURRENT CHROMATOGRAPHIC SEPARATION OF PROTEINS USING SMALL-SCALE CROSS-AXIS COIL PLANET CENTRIFUGE WITH AQUEOUS-AQUEOUS POLYMER PHASE SYSTEMS. J LIQ CHROMATOGR R T 2009; 32:1096-1106. [PMID: 20046931 DOI: 10.1080/10826070902841547] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Countercurrent chromatographic performance of the locular multilayer coil separation column newly designed in our laboratory was evaluated in terms of theoretical plate number, peak resolution and retention of the stationary phase in protein separation with an aqueous polymer phase system using the small-scale cross-axis coil planet centrifuge (X-axis CPC) fabricated in our laboratory. The locular column was made from 1.0 mm I.D., 2.0 mm O.D. or 1.5 mm I.D., 2.5 mm O.D. PTFE tubing compressed with a pair of hemostat at 2 or 4 cm intervals. The protein separation was performed using a set of stable proteins including cytochrome C, myoglobin and lysozyme with the 12.5% (w/w) polyethylene glycol 1000 and 12.5% (w/w) dibasic potassium phosphate system under 1000 rpm of column revolution. The 1.5 mm I.D., 2.5 mm O.D. locular tubing compressed at 2 cm intervals yielded better partition efficiencies than the non-clamped tubing using both lower and upper mobile phases with satisfactory retention of the stationary phase. The overall results suggest that the newly designed locular multilayer coil is useful to the preparative separation of proteins with aqueous-aqueous polymer phase system using our small-scale X-axis CPC.
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Affiliation(s)
- Kazufusa Shinomiya
- College of Pharmacy, Nihon University, 7-7-1, Narashinodai, Funabashi-shi, Chiba 274-8555, Japan
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Sutherland I, Audo G, Bourton E, Couillard F, Fisher D, Garrard I, Hewitson P, Intes O. Rapid linear scale-up of a protein separation by centrifugal partition chromatography. J Chromatogr A 2008; 1190:57-62. [DOI: 10.1016/j.chroma.2008.02.092] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2007] [Revised: 02/11/2008] [Accepted: 02/14/2008] [Indexed: 11/25/2022]
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Shinomiya K, Hirozane S, Kabasawa Y, Ito Y. PROTEIN SEPARATION BY CROSS-AXIS COIL PLANET CENTRIFUGE WITH TWO DIFFERENT POSITIONS OF ECCENTRIC COIL ASSEMBLIES USING POLYETHYLENE GLYCOL-DEXTRAN SOLVENT SYSTEM. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-100101513] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kazufusa Shinomiya
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Shingo Hirozane
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yozo Kabasawa
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yoichiro Ito
- b Laboratory of Biophysical Chemistry , National Heart, Lung, and Blood Institute, National Institutes of Health , Building 10, Room 7N-322, Bethesda, MD, 20892-1676, U.S.A
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Shinomiya K, Kabasawa Y, Ito Y. PROTEIN SEPARATION BY CROSS-AXIS COIL PLANET CENTRIFUGE WITH SPIRAL COLUMN ASSEMBLIES. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120014383] [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)
- Kazufusa Shinomiya
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yozo Kabasawa
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yoichiro Ito
- b Laboratory of Biophysical Chemistry , National Heart, Lung, and Blood Institute , National Institutes of Health , Building 50, Room 3334, Bethesda, MD, 20892-8014, U.S.A
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Shinomiya K, Sasaki Y, Shibusawa Y, Kishinami K, Kabasawa Y, Ito Y. COUNTERCURRENT CHROMATOGRAPHIC SEPARATION OF HIPPURIC ACID AND RELATED COMPOUNDS USING CROSS-AXIS COIL PLANET CENTRIFUGE WITH ECCENTRIC COIL ASSEMBLIES. J LIQ CHROMATOGR R T 2006. [DOI: 10.1081/jlc-100100436] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kazufusa Shinomiya
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yuji Sasaki
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yoichi Shibusawa
- b Department of Analytical Chemistry, School of Pharmacy , Tokyo University of Pharmacy and Life Science , 1432-1, Horinouchi, Hachioji, Tokyo, 192-0355, Japan
| | - Kikueko Kishinami
- c Showa College of Pharmaceutical Science , 3-3165, Higashitamagawagakuen, Machida-shi, Tokyo, 194-0042, Japan
| | - Yozo Kabasawa
- a College of Pharmacy , Nihon University , 7-7-1, Narashinodai, Funabashi-shi, Chiba, 274-8555, Japan
| | - Yoichiro Ito
- d Laboratory of Biophysical Chemistry , National Heart, Lung, and Blood Institute, National Institutes of Health , Building 10, Room 7N-322, Bethesda, MD, 20892-1676, U.S.A
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Shinomiya K, Kabasawa Y, Yanagidaira K, Sasaki H, Muto M, Okada T, Ito Y. Protein separation by nonsynchronous coil planet centrifuge with aqueous-aqueous polymer phase systems. J Chromatogr A 2003; 1005:103-12. [PMID: 12924785 DOI: 10.1016/s0021-9673(03)00915-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Counter-current chromatographic separation of proteins was performed using a rotary-seal-free nonsynchronous coil planet centrifuge (CPC) fabricated in our laboratory. This apparatus has a unique feature that allows a freely adjustable rotational rate of the coiled separation column at a given revolution speed. The separation was performed using a set of stable proteins including cytochrome c, myoglobin and lysozyme with two different types of aqueous-aqueous polymer phase systems, i.e., PEG (polyethylene glycol) 1000-dibasic potassium phosphate, and PEG 8000-dextran T500 in 5 mM potassium phosphate buffer. Using a set of multilayer coiled columns prepared from 0.8 mm I.D. PTFE tubing with different volumes (11, 24, 39 ml), the effect of the column capacity on the partition efficiency was investigated under a given set of experimental conditions. Among these experiments, the best separation of proteins was attained using the 39 ml capacity column with a 12.5% (w/w) PEG 1000-12.5% (w/w) dibasic potassium phosphate system at 10 rpm of coil rotation under 800 rpm. With lower phase mobile at 0.2 ml/min in the head-to-tail elution, the resolution between cytochrome c and myoglobin was 1.6 and that between myoglobin and lysozyme, 1.9. With upper phase mobile in the head-to-tail elution, the resolution between lysozyme and myoglobin peaks was 1.5. In these two separations, the stationary phase retention was 35.0 and 33.3%, respectively. Further studies were carried out using a pair of eccentric coil assemblies with 0.8 mm I.D. PTFE tubing at a total capacity of 20 ml. A comparable resolution was obtained using both lower and upper phases as a mobile phase in a head-to-tail elution. The results of our studies demonstrate that the nonsynchronous CPC is useful for protein separation with aqueous-aqueous polymer phase systems.
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Affiliation(s)
- Kazufusa Shinomiya
- College of Pharmacy, Nihon University, 7-7-1 Narashinodai, Funabashi-shi, Chiba 274-8555, Japan.
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Shinomiya K, Kabasawa Y, Ito Y. Effect of elution modes on protein separation by cross-axis coil planet centrifuge with two different types of coiled columns. Prep Biochem Biotechnol 1999; 29:139-50. [PMID: 10231893 DOI: 10.1080/10826069908544886] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Effect of elution modes on protein separation was investigated using cross-axis coil planet centrifuge (cross-axis CPC) with two different types of coiled columns, i.e., eccentric coil and toroidal coil assemblies. Myoglobin and lysozyme were separated with an aqueous two-phase solvent system composed of 12.5% (w/w) polyethylene glycol 1000 and 12.5% (w/w) dibasic potassium phosphate. The substantial effect of elution modes was observed by the toroidal coil, while the negative result was given at the eccentric coil. Using the toroidal coil, higher peak resolution of proteins was attained at the tail to head elution mode. In the outward lower phase mobile elution mode, the satisfactory separation was obtained by both eccentric coil and toroidal coil assemblies. However, in the inward upper phase mobile elution mode, the toroidal coil produced a broad and asymmetric myoglobin peak. The analysis using polyacrylamide gel electrophoresis revealed that the toroidal coil partially separated the components originally present in the myoglobin sample. As the result, a modified equation was devised to express the peak resolution (Rs) using the lysozyme peak. The overall results indicated that the toroidal coil produced better partition efficiency than the eccentric coil under the optimized experimental condition including the direction of the Coriolis force acting on the mobile phase in the toroidal coil.
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Affiliation(s)
- K Shinomiya
- College of Pharmacy, Nihon University, Chiba, Japan
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