生体の科学9巻2号

1958年04月発行

CONFERENCE ON THE CHEMISTRY OF MUSCULAR CONTRACTION 1957

Some Physical and Enzymatic Phenomena in Solutions of Myosin B

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ページ範囲：P.53 - P.65

　Although "myosin B，" the isolable contractile substance of muscle, has been the object of worldwide study, its nature remains controversial．By most workers it is thought to be a compound of myosin（or "myosin A"）and actin-formable by combination of actin and myosin, and dissociable (［KCl］≧．5) upon addition of ATP．But a few workers have not agreed with all features of this hypothesis．For example, Tsao's observations on the rotaional relaxation time of actin in the presence of myosin were considered by him to be incompatible with assuming that actin forms a compound with myosin（1）．