公羊精子质膜中的磷脂酶A2活性
Phospholipase A2 activity in ram spermatozoa plasma membranes.
作者信息
Hinkovska V T, Momchilova A B, Petkova D H, Koumanov K S
出版信息
Int J Biochem. 1987;19(6):569-72. doi: 10.1016/0020-711x(87)90143-1.
PMID:3609448
Abstract
A highly active phospholipase A2 in ram spermatozoa plasma membranes has been established. Phospholipase A2 was optimally active at pH 7.4 and was Ca2+ dependent. Low concentrations of K+ (25 mM) were found to inhibit phospholipase A2 activity, whereas higher concentrations induced enzyme reactivation. An inhibitory effect of Zn2+ has also been observed.
摘要
已证实公羊精子质膜中存在一种高活性磷脂酶A2。磷脂酶A2在pH 7.4时活性最佳，且依赖Ca2+。发现低浓度的K+（25 mM）可抑制磷脂酶A2的活性，而高浓度的K+则可诱导该酶重新激活。还观察到Zn2+具有抑制作用。
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