Abstract
To test the hypothesis that myosin light chain phosphorylation in the rat extensor digitorum longus muscle is under neural control, we studied changes in the extent of phosphorylation of the myosin light chain following sciatic nerve denervation using two-dimensional gel electrophoresis. The phosphorylated form of myosin light chain 2 was rapidly decreased and disappeared 3 days after denervation. No other changes in myosin light chains were observed. The results suggest that phosphorylation of the myosin light chain in fast skeletal muscle is under positive control of fast-type motor-neuron activity.
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