Characterization of Rabbit Skeletal Muscle Glycogenin

Of a number of nucleotides and related compounds sur- veyed, UDP and UTP were the most effective inhibi- tors. There was also a correlation between inhibition and the presence of a pyrophosphate group. Of several oligosaccharides of glucose, only maltose caused sig- nificant inhibition. The glucosylation reaction was first order with respect to glycogenin suggesting that it was intramolecular. The efficacy of the purified glycogenin