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A complex of actin, myosin, and associated proteins that is responsible for contraction in cells, especially muscle cells.
(Biochemistry) a complex protein in skeletal muscle that is formed by actin and myosin and which, when stimulated, shortens to cause muscle contraction
ac•to•my•o•sin(ˌæk təˈmaɪ ə sɪn)
a complex of the proteins actin and myosin that is a major constituent of muscle tissue and that interacts with ATP to cause muscular contraction.
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|Noun||1.||actomyosin - a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions|
protein - any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes; "a diet high in protein"
actin - one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form
myosin - the commonest protein in muscle; a globulin that combines with actin to form actomyosin