Myosin light chain 3, skeletal muscle isoform is a protein that in humans is encoded by the MYL1gene.
Myosin is a hexameric ATPase cellular motor protein. It is composed of two heavy chains, two nonphosphorylatable alkali light chains, and two phosphorylatable regulatory light chains. This gene encodes a myosin alkali light chain expressed in fast skeletal muscle. Two transcript variants have been identified for this gene.
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Seidel U, Arnold HH (1989). "Identification of the functional promoter regions in the human gene encoding the myosin alkali light chains MLC1 and MLC3 of fast skeletal muscle". J. Biol. Chem. 264 (27): 16109–17. PMID2777779.