1. Of, relating to, or involving pepsin. 
   属于、关于或包括胃蛋白酶的
2. The inactive precursor to pepsin, formed in the cells of the mucous membrane of the stomach and converted to pepsin by hydrochloric acid during digestion. 
   胃蛋白酶原胃蛋白酶的一种不活跃原，在胃粘膜细胞中形成并在消化的过程中通过盐酸转化为胃蛋白酶
3. A substance containing pepsin, obtained from the stomachs of hogs and calves and used as a digestive aid. 
   助消化药可由猪胃、牛胃中提炼出的含胃蛋白酶的物质，用以帮助消化

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