抄録
The degree of myofibrillar protein degradation during spawning migration of chum salmon Oncorhynchus keta was evaluated by concentrating of muscle extracts by ion-exchange column chromatography, followed by measurement of Nτ-methylhistidine (MeHis). The level of MeHis markedly increased during spawning migration, especially in female specimens. MeHis was detected in both myofibril and actin at feeding migration stage. These results indicated that muscle proteins of chum salmon were degraded during spawning migration, resulting in an increase of amino acids including MeHis in the muscle extracts.
