The Biochemistry of Movement > 9.7.5. Muscle cells cause movement by contraction along their length > Identifying Actin And Myosin >
Identify actin and myosin as the long, parallel bundles of protein fibres that form the contractile filaments in skeletal muscle
- Myosin are thick protein filaments that catalyse the hydrolysis of ATP and facilitate the release of energy required for muscle contraction.
- Actin are thin protein filaments that exist in fibrous form. Both tropomyosin and troponin act on these filaments to allow muscle relaxation following contraction.