期刊
BIORESOURCE TECHNOLOGY
卷 98, 期 3, 页码 534-538出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2006.02.006
关键词
marine yeasts; alkaline protease; fermentation; optimal conditions
A yeast strain, Aureobasidium pullulans, which could produce the high yield of protease was isolated from sediment of saltern in Qingdao, China. Maximum production of enzyme (623.1 U/mg protein; 7.2 U/ml) was obtained in a medium containing 2.5 g soluble starch and 2.0 g NaNO3, 100 ml seawater, initial pH 6.0, after fermentation at 24.5 degrees C for 30 h. The protease had the highest activity at pH 9.0 and 45 degrees C. (c) 2006 Elsevier Ltd. All rights reserved.
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