Tryptophan(Trp) in cysteine proteinase inhibitor(CPI) from wheat seed was modified with N Bromosuccinimide(NBS). The data showed that there is one Trp in CPI, the modified CPI lost its inhibitory activity on papain completely.
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释义
用N-溴代丁烯二酰亚胺修饰小麦巯基蛋白酶抑制剂(CPI),计算出CPI分子内有一个色氨酸残基被修饰,修饰的CPI对木瓜蛋白酶的抑制活性全部丧失,表明色氨酸对CPI的活性非常重要,是分子保持抑制活性所必需的;
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