Biology · Support and Movement

Myosin interacts with actin filaments for contraction and has ATPase activity.

Actin is a thin filament protein that plays a crucial role in muscle contraction but is not the primary contractile protein responsible for generating force.

Myosin is the thick filament protein that interacts with actin to produce muscle contraction and has ATPase activity to provide the energy for this process.

Tubulin is a protein that forms microtubules and is involved in cellular structure and transport but is not directly involved in muscle contraction.

Tropomyosin is a regulatory protein that covers actin binding sites during muscle relaxation but does not perform contraction itself.