Myophosphorylase deficiency: two different molecular etiologies.
Two different forms of myophosphorylase deficiency (McArdle's disease) can be distinguished through the presence or absence of the protein subunit corresponding to phosphorylase in muscle extracts analyzed by sodium dodecyl sulfate (SDS) polyacrylamide gel electrophoresis. Two patients showed a complete absence of the phosphorylase protein subunit, while another patient had an increased quantity of an apparently defective phosphorylase protein subunit. On the basis of these observations, the existence of two distinct subtypes of phosphorylase deficiency can be inferred.[1]References
- Myophosphorylase deficiency: two different molecular etiologies. Feit, H., Brooke, M.H. Neurology (1976) [Pubmed]
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