actin

noun/ˈæktɪn/

Frequency rank: #11,244 most common English word

Meaning

A protein found in muscle and other cells that forms filaments involved in movement and structural support.

Illustration for the English word “actin”

Example sentence

Muscle contraction depends on actin filaments sliding past myosin to generate force.

Synonyms & related words

  • microfilament

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