| Project/Area Number |
17550072
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | The University of Tokyo (2006)
Gunma University (2005) |
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Principal Investigator |
ODAKE Tamao The University of Tokyo, Faculty of Engineering, Project Associate Professor (10301128)
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| Co-Investigator(Kenkyū-buntansha) |
TSUNODA Kin-ichi Gunma University, Department of Chemistry, Professor (30175468)
SAHEKI Toshihiko Gunma University, Department of Biological and Chemical Engineering, Assistant Professor (00241860)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2005: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | Electrophoresis / Protein / Proteome / Micro-nano device / Multifilament yarn / Polyacrylamide / Radiation polymerization / Agarose / アクリルアミド / ガンマ線 / 蛋白質 / 両性担体 |
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| Research Abstract |
We proposed multifilament-supporting gel (MFS gel) as a novel first-dimensional isoelectric focusing (IEF) gel of two-dimensional gel electrophoresis (2-DE). The MFS gel could reduce concentration of polyacrylamide down to 2%T (conventionally 4%T), which would provide large pore of the gel, resulting in fast IEF and separation of high-molecular-weight (HMW) proteins up to 200 kDa. However, due to carrier ampholyte added to form pH gradient, stability and reproducibility was not sufficient. The aim of this research was to improve the pH stability and resolution by optimization of the MFS gel and reduction of polyacrylamide gel concentration, to obtain fast 2-DE separation of HMW proteins.
1. Stabilize pH gradient of the MFS gel.
Immobilized pH gradient (IPG) method is known that it provides a stable pH gradient during even a long IEF time. To improve pH stability, IEF method was introduced to the MFS gel. IPG MFS gel was prepared. Further investigation on controlling flow rate and instrumental improvement was still necessary to obtain wider pH range and gel-to-gel reproducibility.
2. Lower the MFS gel concentration
Polyacrylamide gel of lower concentration has larger pore and is expected to provide fast IEF and separation of HMW proteins. Polymerization by heat could provide 1.75%T polyacrylamide, but too fragile for practical use. Addition of agarose was found to be effective to reinforce the low-concentration MFS gel to some degree. Radiation is an alternative to promote polymerization of acrylamide, which effectively produces radicals. We utilized Co-60 gamma ray to prepare MFS gels of low concentration below 2%T. Polyacrylamide of 1.5%T could be successfully prepared and applied to IEF.
3. Application of low-concentration MFS gel to 2-DE
Developed low-concentration polyacrylamide gel was applied to 2-DE. The low-concentration polyacrylamide gels were proved to provide clearer protein spots in the HMW region.
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