Actin

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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.

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.

Actin: Media

protein

Images

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 actin and myosin filaments

Myosin proteins bind to actin filaments and use ATP hydrolysis to drive contraction...

Encyclopædia Britannica, Inc.

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.

Striated muscle

The structure of striated, or skeletal, muscle. Striated muscle tissue, such as the...

Encyclopædia Britannica, Inc.

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