Glycogen primer

The next step involves a transfer of the glucose residue from UDP-glucose onto the glycogen primer through the aid of the enzyme glycogen synthetase ... 

Figure 2.6 GLycogenesis. The addition of glucose to glycogen depends upon the presence of a pre-existing glycogen primer glucose monomers are arranged and added to the primer by glycogen synthase, a key regulatory enzyme that is subject to control by covalent phosphorylation.

Uridine triphosphate 4- glucose-l-phosphate UDPG + pyrophosphate (1) UDPG -f glycogen primer — glycogen 4- uridine diphosphate (2)... 

C. Transfer of glucosyl residues from uridine diphosphate glucose to glycogen primer... 

---