MICROANATOMY

Detailed explanation-1: -Thick myofilaments are comprised of around 300 spirally arranged protein molecules called myosin. Each myosin molecule is composed of two heavy chains and four light chains.

Detailed explanation-2: -Hence the thick myofilament from the given contractile proteins is myosin. So. the correct answer is ‘Myosin’.

Detailed explanation-3: -Introduction. Myosin filaments (also called thick filaments) are key components of muscle and non-muscle cells. In striated muscle, they overlap with thin (actin-containing) filaments in an orderly array, making a repeating pattern of sarcomeres, the basic units of contraction [1] (Figure 1a).

Detailed explanation-4: -Myofilaments are the three protein filaments of myofibrils in muscle cells. The main proteins involved are myosin, actin, and titin.

Detailed explanation-5: -An individual sarcomere contains many parallel actin (thin) and myosin (thick) filaments.