- Myosin is made of two proteins.
- The fibrous protein is long and thin in shape, which enables it to combine with others to form a dlong, thick filament along which the actin filament can move.
The globular proten forms two bulbous structures (the head) at the end of the filament (The tail).
This shape allows it to exactly fit binding sites in the actin molecule, to which it can become attached.
Its shape also means that it can be moved at n angle.
This allows it to change its angle when attached to actin and so move it along, causing the muscle to contract