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1. The enzymic synthesis of the wall polymer poly-(N-acetylglucosamine 1-phosphate) in Staphylococcus lactis N.C.T.C. 2102 was studied by using UDP-[acetyl-(14)C]N-acetylglucosamine and the corresponding nucleotide containing (32)P. 2. Labelled material was extracted from the particulate enzyme preparation with butan-1-ol. Pulse-labelling experiments indicated that this material contained an intermediate in the biosynthesis. 3. The lipid intermediate was partially purified, and chemical and enzymic degradation showed that it was composed of N-acetylglucosamine 1-pyrophosphate in labile ester linkage to an organic-soluble alcohol, possibly a polyisoprenoid alcohol. The methanolysis of sugar 1-pyrophosphate derivatives, including nucleoside diphosphate sugars, is discussed in relation to degradation products obtained from the lipid. 4. The lipids from the particulate enzyme preparation probably contained another compound in which N-acetylglucosamine 1-phosphate is attached to an organic-soluble alcohol; this may participate in the biosynthesis of another polysaccharide. 5. The function of the lipid intermediate in polymer biosynthesis is discussed.

A lipid intermediate in the synthesis of a poly-(N-acetylglucosamine 1-phosphate) from the wall of Staphylococcus lactis N.C.T.C. 2102