Abstract
1. 1. Comparative studies on the effect of d-glucosamine on the synthesis of UDP-sugars and on the incorporation rate of [ 14C]glucose into neutral sugars, sialic acid and glucosamine isolated from chicken liver and hepatoma Mc-29 plasma membranes have been carried out. 2. 2. The influence of d-glucosamine on the activity of microsomal UDP-W-acetylglucosamine:glycoprotein N-acetylglucosaminyltransferase to lipid (dolichol monophosphate) and to protein acceptor was studied too. 3. 3. It has been shown that d-glucosamine provokes alterations in the content and synthesis of UDP-sugars and it is an inhibitor of the glycosylation processes. An inhibitory effect of this sugar analog on the N-acetylglycosaminyltransferase has been established.
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