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. (mesh:D000199)



Synonym Reference Specificity
actins Exact
actin Exact

Incoming Relations

Identifier Name Relation
FPLX:F_actin F_actin isa
FPLX:G_actin G_actin isa

Outgoing Relations

None available.