Abstract
Muscle proteins degradation is one of the important manifestations relating to corruption of freshwater fishes during storage. In this paper, the changes in molecular weight distribution of grass carp muscle proteins during storage at nomal temperature were analyzed by SDS-PAGE and SEC-HPLC measurements. The results showed that the fish muscle proteins were always subject to changes during the whole process of storage, but significant changes of fish muscle proteins took place after 24 hours of storage. Particularly, the high molecular weight proteins were almost completely degraded after storage 24 hours, and the low molecular weight proteins were relatively stable but still undertaken more than 50% of degradation. Our results provide some new evidence for the change law of fish muscle proteins during early storage period.
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