Mepụta ụdị dị mgbagwoju anya nke ahịrịokwu a Actin bụ protein globular (~ 43 kDa) nke na-eme ka polymerizes wee mepụta usoro filament nke nwere protofilaments abụọ nke actin na-ekpuchi ibe ha.
N'ezie, nsụgharị dị mgbagwoju anya nke ahịrịokwu ahụ bụ "Actin bụ protein globular (~ 43 kDa) nke na-eme ka ọ bụrụ polymerizes ma na-etolite n'ime usoro filament nke nwere protofilaments abụọ na-ekpuchi ibe ha, iji mepụta otu 'filament actin' (nke a na-akpọbu'microfilament'.) "