What is the myofilament with a knob like head?

The myofilament with a knob-like head is called myosin. Myosin is a thick filament protein found in muscle tissue. It is composed of two heavy chains and four light chains. The heavy chains form the body of the myosin molecule, while the light chains are located at the head of the molecule. The head of the myosin molecule contains a globular region called the motor domain. The motor domain is responsible for the interaction between myosin and actin, which is another thin filament protein found in muscle tissue. The interaction between myosin and actin is essential for muscle contraction.