The proximate analysis of silver carp wastes during processing shows that the contents of protein are 12.3% in head and 18.2% in skin and bone, calcium contents are 3.2% in head and 1.5% in skin and bone. In addition, the amino acid composition in the protein is fairly balanced, which indicates the protein is of high value in utilization. A neutral protease was applied to the silver carp wastes for hydrolyzation in this study. The conditions for the hydrolytic reaction were determined by the...