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应用凝胶过滤层析及等电聚焦等方法，对大鼠输精管中蛋白激酶Ｃ抑制剂进行了分离纯化。其等电点约在ｐＨ４．５，分子量的为６３ｋＤ。实验表明：大鼠输精管平滑肌中也存在着一种内源性ＰＫＣ抑制剂，并可能与ＰＫＣ共同参与组织细胞生物功能的调控。
The protein kinase C inhibitor in rat vas deferens was isolated and purified by gel filtration chromatography and isoelectric focusing. The isoelectric point of about pH4.5, the molecular weight of 63kD. Experiments show that: there is also an endogenous PKC inhibitor in rat vas deferens smooth muscle, and may be involved in the regulation of biological function of cells with PKC.