10. The caviar yield from rainbow trout roe is about 90% compared to 70% with conventional
mechanical methods
11. Enzymatic methods, based on cold-adapted fish enzymes, can be used for other fish roe
processing operations
⑴ Remove the mucoprotein layer
⑵ Survival of larvae
⑶ Enzymatic removal of the chorion from fish eggs
④ Preparation of cured fish products
1. Proteolytic enzymes may be used as processing aids in preparing ripened, salted fish
2. In traditional cured fish products, a partial proteolysis occurs by endogenous enzymes
⑴ This is caused by muscle proteases
⑵ The activity of these muscle proteases is small compared to that of gastrointestinal tract
⑶ These fish protease play a decisive role in the maturing or ripening process of meat
(4) Production of herring products by maturing process originates from Scotland in the 8th century
3. Traditional maturing procedure is time-consuming and demands large storage capacity
4. Trypsin-type enzymes from the Pyloric caecum are major endopeptidase in ripening process
5. The solution is he use of purified fish or shellfish digestive enzymes (cold-active proteases)