作者:I. V. Gorokhova、A. E. Ivanov、V. P. Zubov
DOI:10.1023/a:1013902202789
日期:——
acetone-water media in the presence of the lipase from Pseudomonas fluorescens was found to be accompanied by the coprecipitation of the enzyme. Within the lyophilized coprecipitates, the lipase exhibits a high catalytic activity and enantioselectivity in the reaction of (1RS)-phenylethanol acetylation with vinyl acetate in t-butyl methyl ether. In order of increasing lipase activity, the coprecipitates can
发现在脂肪酶存在下,荧光假单胞菌会在丙酮-水介质中沉淀出N-鲸蜡胺,N-鲸蜡乙酰胺,己基1,2-二醇,鲸蜡醇和聚甲基丙烯酸丁酯。酶。在冻干的共沉淀物中,脂肪酶在叔丁基甲基醚中的(1RS)-苯乙醇乙酰化与乙酸乙烯酯的反应中表现出高催化活性和对映选择性。为了增加脂肪酶的活性,共沉淀物可以按以下顺序排列:鲸蜡醇,聚(甲基丙烯酸丁酯),十六烷-1,2-二醇,N-鲸蜡胺和N-鲸蜡乙酰胺,活性为2.5--19-倍超过天然酶的活性。将脂肪酶固定在固体支持物上,例如Celite 545(物理吸附)和Eupergit C250L(共价结合),在十六烷-1,2-二醇存在下,发现该酶可以增加酶的酯化活性。该文件的英文版。