《英文msh词典》alpha-Actin
[入口词] alpha-Actin
[主题词] Actins
[英文释义] 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.