摘要
在152 株脂肪酶产生菌中,链霉菌Z942 产脂肪酶活力为596u/ mL,其最适培养基(g/L) 为:糊精10 、黄豆饼粉30 、尿素10 、K2HPO4 0-5 、MgSO4 0-5 、NaCl 1 和AEO9 0 .5 ,产酶的最适条件为:初始pH9 .5 ~10-0 ,在26 ℃培养48h 。用PVA 橄榄油乳化系统测定该酶的最适pH9 .8 ,最适温度37 ℃,在pH8-6 ~10-2 于5 ℃存放24 h ,酶活力不变。0-14mol/L 的氯化钙有较大的激活作用。
An alkaline lipase producing strain streptomyces Z94 2 was selected from 152 lipase producer,The optimal medium composition for the producing lipase is (g/L):soybean meal 30,urea 10,dextrin 10,KH 2PO 4 0.5,NaCl 1,MgSO 4·7H\-2O 0.5,AEO\-9(nonionic surfactant)1.The optimal conditions for lipase producing are initial pH9.5~10.0,shaken at 26℃,for 48h,a maximal lipase activity of reached 596(u/mL).The optimal activity at pH9.8 and at 37℃, respectively.The lipase was stable at pH8.6~10.2 and below 60℃,and the lipase was highly activated by 0.14 mol/L CaCl 2.
出处
《微生物学报》
CAS
CSCD
北大核心
2000年第1期75-79,共5页
Acta Microbiologica Sinica
基金
浙江省科委重点项目
浙江省自然科学基金
关键词
碱性脂肪酶
链霉菌
产酶条件
酶学性质
Alkaline lipase, Streptomyces, Conditions of enzyme production,Properties of enzyme