myofilament

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Introduction

Threads of filamentous proteins of myofibrils in striated muscle.

Thick filaments contain myosin; thin ones contain actin.

Thick & thin myofilaments also occur in smooth muscle, but are not regularly arranged as myofibrils & do not give the appearance of striation.

References

  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.