Hefferan P M, Howell R R
Biochim Biophys Acta. 1977 Feb 28;496(2):431-5. doi: 10.1016/0304-4165(77)90325-7.
We demonstrate that glucose-6-phosphatase, pyrophosphate-glucose phosphotransferase, carbamyl phosphate-glucose phosphotransferase and inorganic pyrophosphatase activities are deficient in livers of patients with type I glycogen storage disease. This provides strong genetic evidence that these enzymatic activities reside in a single protein or share a common polypeptide chain.