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요약정보
树脂载体固定S-腺苷甲硫氨酸合成酶的研究 / Immobilization of S- adenosyl- L- methionine Synthetase on Resins
Resource Type
Academic Journal
Authors
卢泓宇
;
姚文兵
;
徐明波
;
牛罡
;
LU Hong-yu
;
YAO Wen-bing
;
XU Ming-bo
;
NIU Gang
Source
生物技术 / Biotechnology
. 22(1):90-93
Subject
阴离子交换树脂
固定化酶
S-腺苷甲硫氨酸合成酶
重组大肠杆菌
Language
Chinese
ISSN
1004-311X
Online Access
Find it @ DONGA
초록
目的:筛选一种适合S-腺苷甲硫氨酸合成酶固定化的树脂载体,进行固定化工艺优化及固定化酶性质研究.方法:以固定化率和表观酶活回收率为指标,筛选固定化效果最佳的一种树脂,采用单因素实验对固定化条件进行优化.结果:阴离子交换树脂载体ESR -2表现出最优的固定化率(94.03%)和酶活回收率(47.45%);最佳固定化条件为加酶量4U/g、pH 8.0、15℃吸附10h,最佳条件下固定化酶表观酶活为2.1U/g,表观酶活回收率达51.6%.固定化酶的最适pH为8.5,最适温度为35℃,连续反应10批次后酶活剩余77.92%.结论:树脂载体ESR -2固定化S-腺苷甲硫氨酸合成酶酶活及稳定性较好,能够用于S-腺苷甲硫氨酸的工业化大规模生产.
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