单因子-响应面法优化白地霉Y162产脂肪酶条件

被引:16
作者
阎金勇
杨江科
闫云君
机构
[1] 华中科技大学生命科学与技术学院
关键词
脂肪酶; 白地霉Y162; Plackett-Burman设计; 响应面法; 优化;
D O I
10.13523/j.cb.20070813
中图分类号
TQ925 [酶制剂(酵素)];
学科分类号
摘要
对白地霉Y162液体发酵产脂肪酶的条件进行了优化。首先采用单因子实验筛选出最适碳源为橄榄油,氮源为黄豆粉和NH4Cl,无机盐为BaCl2和MgCl2。在此基础上,利用Plackett-Burman设计对影响产酶因素的效应进行评价,筛选出具有显著效应的橄榄油、BaCl2和NH4Cl三个最显著的因素。用最陡爬坡路径逼近最大产酶区域后,利用响应面中心组合设计对显著因素进行优化,得出橄榄油、BaCl2和NH4Cl最佳浓度分别为2.35%,0.36%,1.35%。优化后液体发酵液中脂肪酶活力提高到31.85U/ml,比初始酶活力14.16U/ml提高了2.25倍,表明单因子-响应面结合法可显著优化白地霉Y162液体发酵产脂肪酶条件。
引用
收藏
页码:69 / 75
页数:7
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