Myosin: Quick Facts

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Diagram showing the structure and interaction of actin and myosin filaments in muscle, with labeled actin filaments, myosin filaments, tropomyosin molecules, troponin, and a myosin molecule with rod and heads.

The structure of striated muscle fibers

Diagram showing the structure of human striated or skeletal muscle, with labeled cross-sections from whole muscle to fascicle, muscle fiber, myofibril, and sarcomere, highlighting actin and myosin filaments.

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