Glycogen Phosphorylase, Muscle Form

**Definition:** An isoenzyme of GLYCOGEN PHOSPHORYLASE that catalyzes the degradation of GLYCOGEN in muscle. Mutation of the gene coding this enzyme is the cause of McArdle disease (GLYCOGEN STORAGE DISEASE TYPE V).

**Tree numbers:** - D08.811.913.400.450.460.400.186.312

**Synonyms:** - Myophosphorylase - Myophosphorylase a and b