Daftar Isi:1. Organisation and properties of the striated muscle sarcomere 2. The nature of the actin molecule 3. The structure of F-actin calculated from X-ray fibre diagrams and the 0 6 nm crystal structure 4. Muscle mechanics and biochemical kinetics 5. Crossbridge patterns in defined static states in insect asynchronous 6. Nuclear magnetic resonance studies of calcium-modulated proteins and actin-myosin interaction 7. Cfrossbridge movements monitored by extrinsic probes 8. Functional aspects of the myosin rod in contraction 9. Equatorial X-ray diffraction studies of single skinned muscle fibres 10. Static and time-resolved X-ray diffraction studies of fish muscle