|PHYSIOLOGY| |ANATOMY| |MECHANISM| |ACTIN| |MYOSIN| |TROPONIN| |TROPOMYOSIN| |TITIN| |MBBS,BDS,DPT|
Actin: Actin is a globular protein that forms microfilaments, a component of the cytoskeleton. In muscle cells, it interacts with myosin to generate force and cause muscle contraction.
Myosin: Myosin is a motor protein that interacts with actin to generate the contractile force in muscle cells. It's often referred to as the "thick filament" in muscle cells.
Troponin: Troponin is a complex of three proteins (troponin C, troponin I, and troponin T) that is integral to muscle contraction regulation. It binds to calcium ions and helps in the regulation of the interaction between actin and myosin.
Tropomyosin: Tropomyosin is a protein that, along with troponin, regulates muscle contraction by controlling the interaction between actin and myosin. It covers the myosin-binding sites on actin when muscles are at rest, preventing contraction.
Titin: Titin is a giant protein found in muscle cells. It plays a role in the elasticity and extensibility of muscle fibers, contributing to the passive stiffness of muscles and aiding in muscle contraction and relaxation.