活力定义：25°C时，pH7.65，每分钟催化1 μmol 马尿酰-L-精氨酸水解的酶量定义为一个酶活力单位

来源：猪胰。

介绍：Carboxypeptidase B catalyzes hydrolysis of the basic amino acids lysine, arginine and ornithine from the C-terminal end of polypeptides. The molecular weight is 34,500 daltons, the pH optimum is 7.9, and the pI is 6.0. Carboxypeptidase B is competitively inhibited by arginine, lysine and ornithine. The enzyme is not inhibited by di-isopropylfluorophosphate (DFP), but it is inhibited by metal chelating agents, e.g., 1,10-phenanthroline.

储存条件：-20℃

外观：液体

用途：可专一性地从肽链的C端开始逐个降解，释放出游离氨基酸的一类肽链外切酶。羧肽酶B只水解以碱性氨基酸（如精氨酸和赖氨酸）为C末端残基的肽键。