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Effects and Optimization of Gamma-Amino Butyric Acid (GABA) Production Process using Glutamate Decarboxylase (GAD)

Glutamate Decarboxylase (GAD)를 이용한 Gamma-Amino Butyric Acid (GABA) 생산 및 최적화

  • Kim, Eui Jin (Department of Chemical & Biochemical Engineering, Chosun University) ;
  • Lee, Jung-Heon (Department of Chemical & Biochemical Engineering, Chosun University)
  • 김의진 (조선대학교 생명화학공학과) ;
  • 이중헌 (조선대학교 생명화학공학과)
  • Received : 2014.10.14
  • Accepted : 2014.11.10
  • Published : 2014.12.30

Abstract

pH controlled batch reactor and bubble column reactors have been developed in this research. They were used to produce high concentration of GABA and to determine optimal pH for GABA production. Glutamate decarboxylase (GAD) was isolated from recombinant E. coli and used for GABA production from monosodium glutamate (MSG). pH control was inevitable because the pH increased with MSG consumption. GAD showed highest activity at acidic conditions at pH 5.5 but the optimal pH for GABA production was pH 6.0. When 1.5 mole of MSG was used as reactant, the 1.05 mole of GABA was produced after 10 hrs batch reaction. Using bubble column reactors, 80 % of MSG was converted to GABA for 6 hrs reaction and 1.2 mole of GABA was produced.

Keywords

References

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