木瓜蛋白酶是采用生物工程技术从番木瓜植物未成熟的果实中提炼而得的纯天然生物酶制品，它是由212个氨基酸组成，分子量为21000，属于含巯基（—SH）肽链内切酶，具有蛋白酶和酯酶的活性，有较广泛的特异性，对动植物蛋白、多肽、酯、酰胺等有较强的酶解能力，同时还具有合成的能力，可把蛋白质水解物再合成蛋白质类物质，这种能力可用来改善动植物蛋白的营养价值或功能性质。

The Papain is a 212-amino-acid, 21,000-molecule enzyme derived from the immature fruit of the papaya plant, it is a sulfhydryl (- SH)-containing peptide chain endonuclease. It has the activity of protease and esterase, has extensive specificity, and has strong enzymatic hydrolysis ability to animal and plant proteins, peptides, esters, amides, etc. , at the same time, it also has the ability to synthesize protein hydrolysates, which can be used to improve the nutritional value or functional properties of animal and plant proteins.