Now, a recent paper 1 has filled in key details, presenting a landmark structure — the crystal structure of the smooth muscle myosin motor-domain with the essential light chain crystallized with ...

seen as a cross-bridge between actin and myosin filaments in muscle, acts as the motor domain of the molecule and pulls actin filaments along by repetitive conformational changes coupled to ATP ...

Medically reviewed by Katrina Carter, DPT Voluntary muscles, also known as skeletal muscles, are muscles that can be consciously controlled, such as the muscles of your limbs, head, neck, and body.