Human erythrocyte membranes contain the enzymes responsible for the synthesis of dolichol-P-glucose, dolichol-P-mannose, dolichol-PP-N-acetylglucosamine, dolichol-PP-NN' diacetylchitobiose and of dolichol-PP-oligosaccharides containing NN' diacetylchitobiose and mannose or the same sugar residues plus glucose. The transfer of the oligosaccharide moieties from the dolichol-PP-oligosaccharides to endogenous proteins could not be detected. These enzymes appeared to be integral membrane proteins.
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