AKA g actin, this short polypeptide
chain of 375 amino acid
s is the monomeric unit of the protein actin
(one of the two proteins involved in muscle
contraction). Many units of G actin join together in a polymer to make an actin filament.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.