Light Scattering Studies on the Stepwise Formation and Dissociation of Actomyosin

　The studies initiated in Szent-Györgyi's laboratory（1）have clearly established that the fibrous muscle protein known in the early literature as myosin, as myosin-B of the Szeged-group, consists of two proteins, viz．myosin proper（L-myosin of Weber）and F-actin, and, subsequently, the more appropriate term actomyosin was adopted to denote the complex．It is obtainable not only by direct extraction from muscle by slightly alkaline salt solutions of fairly high ionic strength（natural actomyosin）but it can also be reconstituted from purified myosin and F-actin．