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Glycerol Addition for the Hyper-production and Stabilization of a Novel Carbohydrolase by Lipomyces starkeyi  

이선옥 (전남대학교 물질ㆍ생물화학공학과)
이진화 (전남대학교 공업기술연구소)
박준성 (전남대학교 물질ㆍ생물화학공학과)
서은성 (전남대학교 물질ㆍ생물화학공학과)
김창용 (전남대학교 물질ㆍ생물화학공학과)
조동련 (전남대학교 응용화학부)
김도원 (강릉대학교 물리학과)
김도만 (전남대학교 공업기술연구소, 전남대학교 응용화학부)
Publication Information
KSBB Journal / v.17, no.6, 2002 , pp. 586-589 More about this Journal
Abstract
Lipomyces starkeyi KSM 22 produces dextranase and amylase (DXAMase). The addition of 0.02% (w/v) 2-deoxy-D-glucose or 0.5% (w/v) glycerol into a 1% (w/v) starch medium increased the final activity of DXAMase produced 2.5 fold or 2.4 fold, respectively, compared to that of a 1% (w/v) starch medium. This activity was similar to that produced with 1% (w/v) dextran. The stability of purified OXAMase at 40$\^{C}$ for 3 weeks was tested using the various enzyme stabilizers. With the addition of 25% (v/v) glycerol, 90.9% of initial activity was left after 3 weeks. For practical use, the addition of 1% (v/v) glycerol with 50 mM of CaCl$_2$ or KH$_2$PO$_4$was adequate and maintained 73.4% of the initial activity under the test conditions used.
Keywords
Lipomyces starkeyi; dextranase; production; stabilization; glycerol;
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