THE myosin crossbridges which project from the thick filaments of striated muscle are known to bend and attach to the thin filaments in the absence of their enzymatic substrate, ATP 1. Huxley and ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

In a serendipitous discovery, UC San Diego researchers using cryo-EM technology captured the first visualizations of the 3-D structure of the muscle acetylcholine receptor in fetal and adult muscles.

Proceedings of the Royal Irish Academy. Section B: Biological, Geological, and Chemical Science, Vol. 73 (1973), pp. 95-108 (14 pages) Tetanic contraction significantly lowered the concentration of ...