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食品研究与开发:2016,37(2):183-186
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米曲霉氨基酰化酶的纯化及粗酶性质研究
张媛媛,张彬
(石家庄学院 化工学院,河北 石家庄 050035)
Study on Purification and Properties of Aminoacylase of Aspergilus oryzae
ZHANG Yuan-yuan, ZHANG Bin
(Institute of Chemical Technology, Shijiazhuang University, Shijiazhuang 050035, Hebei, China)
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投稿时间:2014-10-13    
中文摘要: 利用硫酸铵分级盐析法从米曲霉 L-09 中提取氨基酰化酶,比活力为 56.01 U/mg,纯化倍数为 2.06,酶活力回收 率为 80 %。详细研究该粗酶的酶学性质。结果表明,经盐析法提纯的粗酶最适 pH 为 7,最适反应温度为 55 ℃,在 55 ℃下热稳定性良好。溶液中的金属离子对酶活力有很大影响。其中,高浓度的 Fe2+、Mn2+和 Ca2+对酶活力有抑制作用,低浓 度的 Co2+离子对酶活力有激活作用。
中文关键词: 氨基酰化酶  纯化  粗酶性质
Abstract:The aminoacylase from Aspergillus oryzae was partially purified by ammonium sulfate fractionation. The specific activity of aminoacylase was 56.01 U/mg. The purification ratio and recovery were 2.06 and 80 %. The optimal pH of aminoacylase was 7.0. The optimal temperature of aminoacylase was 55 ℃ . The thermal stability of aminoacylase under 55 ℃ was good. The ions in the solvent infected the aminoacylase. Fe2+, Mn2+and Ca2+ in high concentration lowered the activity of aminoacylase, the Co2+ in low concentration activated the aminoacylase.
文章编号:201602046     中图分类号:    文献标志码:A
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