Ultrastructure of the Striated Muscle of the Scallop (Placopecten magellanicus)

Publisher Website
Google Scholar
Abstract
The striated adductor muscle of the scallop Placopecten magellanicus is described. The fusiform uninucleate cells contain one fibril which is divided into A and I zones, and has Z and H bands. The A zone is 1.9 μ long, and in this zone apart from the H band about eight actin filaments surround each myosin filament. A sarcoplasmic reticulum envelops the fibril. Tubules of this reticulum are mainly oriented longitudinally and swellings from dyads with the sarcolemma.