Actins

Synonyms

Actin

F Actin

F-Actin

G Actin

G-Actin

Isoactin

N Actin

N-Actin

alpha Actin

alpha Isoactin

alpha-Actin

alpha-Isoactin

beta Actin

beta-Actin

gamma Actin

gamma-Actin

Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.