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This product is a trypsin analogue derived from microorganisms, the recognition site is lysine or arginine, and the cutting site is the carboxyl end of arginine or arginine residues. It does not contain any animal-derived ingredients, has no animal-derived virus contamination （such as swine influenza virus, porcine parvovirus, etc.）, lacks chymotrypsin activity naturally, and is a substitute for pig or bovine trypsin. This product has mild action on digestion cells and is stable and easy to store.