ティラピア・ミオシンの加熱初期に起るフィラメント形成能と生化学的活性の変化

概要

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Changes in some biochemical activities and filament formation ability of tilapia myosin during heat treatment were studied.The Mg-ATPase activity and superprecipitation activity of tilapia actomyosin constituent, increased in the very early period of heat treatment of tilapia myosin. On the other hand, tilapia heavy-meromyosin (HMM) showed a decreasing Mg-ATPase activity in the presence of actin, as the time of heating was prolonged.Electron microscopy revealed that the filaments of tilapia untreated myosin were much shorter than those of rabbit untreated myosin, and filaments of tilapia myosin became thicker and longer in the early period of heat treatment.On the basis of these findings, it was strongly suggested that the changes in actin-activated Mg-ATPase and superprecipitation activities of tilapia actomyosin are closely correlated with those in the physiological state of myosin filaments.
日本水産學會の論文