Fig. 2. Identification of parvalbumin in sheepshead muscle. Upper image is a SyproRuby-stained SDS–PAGE gel showing a pair of bands in the 10–11 kDa range in red, pink and white muscle of sheepshead. The lower image is a western blot of the same gel employing an anti-parvalbumin antibody. All three muscle fiber types appear to express the same two parvalbumin isoforms.