Definition of actin in English:

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actin

Pronunciation: /ˈaktən/

noun

Biochemistry
A protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cells.
Example sentences
  • Muscle contraction is dependent on two proteins, actin and myosin.
  • As the cells round up, actin and myosin moieties are being redistributed underneath the plasma membrane.
  • Striated muscle contraction is regulated by a protein complex bound to actin.

Origin

1940: from Greek aktis, aktin- 'ray' + -in1.

For editors and proofreaders

Syllabification: ac·tin

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