Paramyosin is a major structural component of many thick filaments isolated from invertebrate muscles. Thick filaments of the myofibrils. Additional isoforms seem to exist. Isoforms can also be produced by post-translational modifications. Found in all adult muscle tissues except in indirect flight muscles and a set of temporary abdominal muscles. Not detected in larval muscle. Phosphorylated. Belongs to the paramyosin family.