1960 年 35 巻 1-3 号 p. 27-39
The localization of ATPase and g lycogen in the “Chiai” muscle in comparison with those of the lateral one was studied in relation to the distribution pattern of mitochondria.
In the “Chiai” muscle, AT P ase activity appears exclusively in the sarcoplasm rather than in the myofibrils at pH 8.25. The activity is intensive, but of varying grades according to the length of in cubation period. Its localization is in complete accordance with the site of mitochondria in the sarcoplasmic mantle as well as in the intercolumnar sarcoplasm. The junior author's columnosomes presented particularly much increased ATPase activity.
The “Chiai” muscle contains a large amount of glycogen as energy source in the sarcoplasm. On the basis of this, energetics in the “Chiai” muscle was discussed in relation to ATPase activity and it led us to a conclusion that this muscle contains a large amount of energy which serves for durable action such as tension of the body sides of fish and for contractile action such as body movement in swimming. To support this last point, recent electrophysiological results related are discussed in this report.
