新生猪胃中凝乳酶（EC 3.4.23.4）的证明。
Demonstration of chymosin (EC 3.4.23.4) in the stomach of newborn pig.
作者信息
Foltmann B, Lønblad P, Axelsen N H
出版信息
Biochem J. 1978 Feb 1;169(2):425-7. doi: 10.1042/bj1690425.
Abstract
The stomach of newborn pig contains a proteinase that is immunologically closely related to calf chymosin (rennin) (EC 3.4.23.4.). None of the pepsins from the stomach of adult pig is present in the newborn pig. Pig chymosin has optimal general proteolytic activity around pH 3.5. The ratio of milk-clotting activity to general proteolytic activity is about 30--70 times higher than that of pyloric and fundic pepsins.
摘要
新生仔猪的胃中含有一种蛋白酶，它在免疫学上与小牛凝乳酶（EC 3.4.23.4）密切相关。成年猪胃中的胃蛋白酶在新生仔猪中均不存在。猪凝乳酶在pH 3.5左右具有最佳的一般蛋白水解活性。其凝乳活性与一般蛋白水解活性之比比幽门和胃底胃蛋白酶高约30至70倍。
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