[A mechanism for dual-stage kinetics of actomyosin superprecipitation].

It has been shown that a step-like superprecipitation of actomyosin is determined by parallel processes of two types of superprecipitation: "immediate", which is characterized by a rapid one-step increase in turbidity, and "spontaneous", when slow increase growth of turbidity follows a clear phase. It is suggested that this phenomenon is based on heterogeneous nature of particle sizes in the original suspension, which, under certain conditions, leads to "constriction" of larger particles and "clearing" of smaller ones.