Glycogenin primer is glucosylated by:: (A) UDP Glucose, (B) Glucose 1 PO4, (C) UDP Glucose 1 PO4, (D) UDP Glucose 6 PO4
Answer is A. Ans. A. UDP Glucose(Ref: Harper 31/e page 164)Glycogenin, a 37 kDa protein is glucosylated on specific tyrosine residue by UDP glucose.Glycogenenin catalyses transfer of 7 glucose residue from UDP-Glc, in l-4 linkage to form Glycogen primer.Further Glucose on glycogen primer are added by Glycogen Synthase to nonreducing end till growing chain is at least 11 glucose residue long.