酿酒酵母胞内无机焦磷酸酶的分离纯化及性质
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摘要:
An inorganic pyrophosphatase (EC3.6.1.1) from Saccharomyces cerevisiae was purified to PAGE homogeneity by sonication disruption. (NH4)2SO4 fractionation and DEAE-cellulose colunm chromatography. The optimum pH and temperature of the enzyme were 7.4～7. 8 and 60℃, respectively. The Km was 19.3 mmol / L. The enzyme required Mg2+ as a cofactor for hydrolysis of pyrophosphate and was inhibited by Ca2+, Hg2+, Pb2+, Mn2+.
Abstract:
An inorganic pyrophosphatase (EC3.6.1.1) from Saccharomyces cerevisiae was purified to PAGE homogeneity by sonication disruption. (NH4)2SO4 fractionation and DEAE-cellulose colunm chromatography. The optimum pH and temperature of the enzyme were 7.4～7. 8 and 60℃, respectively. The Km was 19.3 mmol / L. The enzyme required Mg2+ as a cofactor for hydrolysis of pyrophosphate and was inhibited by Ca2+, Hg2+, Pb2+, Mn2+.
参考文献
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苟萍 杨寿钧. 酿酒酵母胞内无机焦磷酸酶的分离纯化及性质[J]. 微生物学报, 1998, 38(3):
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