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http://dx.doi.org/10.3746/jkfn.2002.31.2.211

Characteristics of Protease Produced by Rhizopus stolonifer, Rhizopus oryzae and Absidia corymbifera from Korean Traditional Meju  

임성일 (한국식품개발연구원 생물공학연구본부)
곽은정 (한국식품개발연구원 생물공학연구본부)
최신양 (한국식품개발연구원 생물공학연구본부)
유진영 (한국식품개발연구원 생물공학연구본부)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.31, no.2, 2002 , pp. 211-215 More about this Journal
Abstract
Pretense production and its characteristics were investigated for Rhizopus stolonifer, Rhizopus oryzae and Absidia corymbifera which were isolated from Korean traditional meju. The optimum culture conditions of the strains for the production of protease in basic medium [wheat bran : 1% glucose solution=1 : 1 (w/v)] were 3$0^{\circ}C$ and 4 days. The optimum pH and temperature for the enzyme activity of crude enzymes produced by Rhizopus sto-lonifer, Rhizopus oryzae and Absidia corymbifera were pH 6.0 and 5$0^{\circ}C$, respectively. The enzymes were relatively stable at pH 4.0~7.0, at temperature below 4$0^{\circ}C$, and at NaCl concentration lower than 16%. The $K_{m}$ value for Hammastein casein was 3.3$\times$10$^{-4}$ , 0.75$\times$10$^{-4}$ and 1.3$\times$10$^{-4}$ M, and $V_{max}$ value was 17.2$\mu\textrm{g}$/min, 9.4$\mu\textrm{g}$/min and 7.8$\mu\textrm{g}$/min, respectively.y.
Keywords
Rhizopus stolonifer; Rhizopus oryzae; Absidia corymbifera; protease; meju;
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