Enzymes that cause food spoilage

enzyme food spoilage action

ascorbic acid oxidase vegetables destruction of vitamin C

lipase cereals discoloration

milk hydrolytic rancidity

oils hydrolytic rancidity

lipoxygenase vegetables destruction of vitamin A, off-flavour

pectic enzyme citrus juices destruction of pectic substances

fruits excessive softening

peroxidase fruits browning

polyphenoloxidase fruits, vegetables browning, off-flavour, vitamin loss

protease eggs reduction of shelf life of fresh and dried whole eggs

crab, lobster overtenderization

flour reduction of gluten formation

thiaminase meats, fish destruction of thiamine