English Dictionary

actin

noun

(biochemistry, uncountable) A globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament). / (biochemistry, countable) One of the six isoforms of actin.

Actin is a protein that plays a crucial role in cell movement and muscle contraction.

意味（1）

(biochemistry, uncountable) A globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament).

Actin has kidney-shaped polypeptide subunits, called globular actin or G actin, which bear the active sites to which the myosin heads attach during contraction.

意味（2）

(biochemistry, countable) One of the six isoforms of actin.