👉 In biology, a paramyosin is a protein that is involved in the regulation of muscle contraction. It plays a key role in the contractile function of skeletal muscles and can be found in various types of muscle cells, including skeletal muscles, smooth muscle, cardiac muscle, and slow-twitch muscle fibers. The function of paramyosin is to regulate the speed and strength of muscle contraction by modulating the activity of protein kinases involved in muscle cell proliferation and differentiation.