Species differentiation in fish by electrophoretic analysis of skeletal muscle proteins.

Extracts of skeletal muscle protein from ten species of the fresh-water sunfish family were examined by the electrophoretic technique, and the resulting patterns showed characteristic specificity in each instance. Usually three major components of greater mobility were accompanied by slower moving minor components. No uniformity of mobility or of proportion of protein was evident. Thus patterns that "fingerprint" the species are evident.