: a protein that is associated with a transmembrane complex of skeletal muscle cells and that is absent in Duchenne muscular dystrophy and deficient or defective in Becker muscular dystrophy
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: a protein of high molecular weight that is associated with a transmembrane glycoprotein complex of skeletal muscle cells and is absent in Duchenne muscular dystrophy and deficient or of abnormal molecular weight in Becker muscular dystrophy