Abstract
New polyglucose was synthesized from uridine diphosphoglucose in the rabbit skeletal muscle fibers by the electron histochemical procedure. It was presumably formed from the substrate by the enzyme UDPglucose glycogen glucosyltransferase activity. The new polyglucose particles were deposited either singly or as strings of beads or as branched strings. Single particles were each different in size and density. The beads arranged in order from the smaller particulates stained faintly to the larger particulates stained more densely with lead.
New products of this polyglucose were abundantly deposited in the whole matrices among various organelles in the intermyofibrillar and subsarcolemmic sarcoplasms, suggesting sites of the enzyme.
