[ noun ] the commonest protein in muscle; a globulin that combines with actin to form actomyosin <noun.substance>
Myosin \My"o*sin\, n. [Gr. my^s, myo`s a muscle.] (Physiol. Chem.) A protein present in muscle, serving as the principle contractile protein in muscle contraction.
Note: It was earlier considered as being formed in the process of coagulation which takes place in {rigor mortis}. See {Muscle plasma}, under {Plasma}. [1913 Webster +PJC]
Note: Myosin belongs to the group of globulins. It is insoluble in water, but soluble in dilute solution of salt, and is especially characterized by being completely precipitated by saturation of its solutions with salt.
The genetic basis of the disease is further complicated by recent findings that show genetic defects not involving myosin can also cause cardiomyopathy, Dr. Seidman said.
An international team of scientists led by Harvard Medical School researchers Christine and Jonathan Seidman reported that the gene responsible for the inherited cardiomyopathy produces a heart muscle protein called the myosin heavy chain.