4. The proteases in squid hepatopancreas
⑴ Cysteine proteases and peptidase (cysteine, metallo-, serine)
⑵ - Dipeptidyl amino peptidase is major peptidase
- More than 10 amino peptidases and several carboxypeptidases
- The aminopeptidases appear to contribute to the delicious taste of aged Cheddar cheese
- Phe-X dipeptidases contribute to removal of bitter peptides
5. The utilization of squid peptidases to enhance cheese ripening requires removal of
the proteases from the extract to obtain a peptidase enriched fraction
6. Treatment of hepatopancreas extracts with Zn serves to inhibit cysteine proteases while
activating metalloproteases such as the aminopeptidases
6) Utilization of marine enzymes in aquaculture
① Use of enzymes to evaluate feed quality
1. The currently used in vitro method for evaluating the digestibility of feed protein is the solubility
of N after digestion of the feed with porcine or bovine pepsin
2. An in vitro digestibility method using digestive enzymes from fish gives a better correlation with
in vivo protein digestibility