3. Fish digestive enzymes were recovered as byproducts from fish-processing wastes of
cod and mackerel
⑴ Mackerel and cod protease by using ultrafiltration and ion exchange chromatography
⑵ Pepsin from an acid aqueous autolysate of cod stomach silage
⑶ Tryptic enzymes from fish sauce
⑷ Alkaline phosphatase in wastewater from the shrimp processing