ACTOMYOSIN CONTENT OF THE HUMAN PLACENTA

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Abstract
Summary: The total soluble protein and the concentration of the contractile protein actomyosin were estimated in the human placenta at varying stages of gestation. As maturity and differentiation of the placenta occurred the proteins increased in concentration. The actomyosin was thought to be present in the smooth muscle fibres in the chorionic plate, and related to the placental vessel walls. The contractile property of the smooth muscle and the demonstration of contractile protein suggested that they play an active role in the dynamics of placental circulation.