title: Molecular heterogeneity in McArdle's disease.
abstract: Biopsies were taken from a group of eleven patients with McArdle's disease, a congenital deficiency in muscle glycogen phosphorylase. The biopsies were screened by Western and Northern blotting for phosphorylase protein, phosphorylase-bound pyridoxal-5'-phosphate (the cofactor of the enzyme) and for phosphorylase mRNA. Of the eleven patients, three expressed phosphorylase mRNA at near normal levels and at the expected size. One of these patients also expressed low levels of phosphorylase protein that correlated with a small amount of measurable phosphorylase activity. These data support the contention of molecular heterogeneity in the presentation of this phenotype.
authors: Muscle Research Centre, Department of Biochemistry, University of Liverpool, U.K.
authors: S M
authors: SM
authors: McConchie
authors: J
authors: J
authors: Coakley
authors: R H
authors: RH
authors: Edwards
authors: R J
authors: RJ
authors: Beynon
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D015152:Blotting, Northern; D015153:Blotting, Western; D003429:Cross Reactions; D014644:Genetic Variation; D006012:Glycogen Storage Disease Type V / Q000201:enzymology / Q000235:genetics* / Q000473:pathology; D006801:Humans; D009124:Muscle Proteins / Q000032:analysis; D006005:Phosphorylases / Q000235:genetics* / Q000276:immunology; D012333:RNA, Messenger / Q000096:biosynthesis
chemical_list: D000911:Antibodies, Monoclonal; D009124:Muscle Proteins; D012333:RNA, Messenger; D006005:Phosphorylases