In McArdle disease, phosphorylase deficiency is the tip of an iceberg.
D006008:Glycogen Storage Disease / Q000209:etiology*; D006012:Glycogen Storage Disease Type V / Q000201:enzymology / Q000209:etiology*; D006801:Humans; D009132:Muscles / Q000201:enzymology; D010749:Phosphoprotein Phosphatases / Q000378:metabolism; D006005:Phosphorylases / Q000172:deficiency*
D006005:Phosphorylases; D010749:Phosphoprotein Phosphatases