PubMed · 6076022
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C M Pounders. 1967. Pediatric trifles.. https://pubmed.ncbi.nlm.nih.gov/6076022/
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Three novel oligosaccharides of human infant faeces have been fully characterised by methylation analysis and 500/600 MHz 1H NMR spectroscopy including DQF-COSY, TQF-COSY, TOCSY and ROESY experiments. The oligosaccharides were shown to be lactose-based structures two of which were substituted at C-6 of Gal with either the Le(x) trisaccharide, Gal(beta 1-4)[Fuc(alpha 1-3)]GlcNAc(beta 1-, or Neu5Ac(alpha 2-6)Gal(beta 1-4)GlcNAc(beta 1-. They differ from other free oligosaccharides previously isolated from the human by having the (1-->6) linkage to Gal in the absence of a (1-->3) branch. The third oligosaccharide has Neu5Ac(alpha 2-6) linked to GlcNAc of the trisaccharide GlcNAc(beta 1-3)Gal(beta 1-4)Glc. This is a linear fragment of the disialylated tetrasaccharide sequence Neu5Ac(alpha 2-3)Gal(beta 1-3)[Neu5Ac(alpha 2-6)]GlcNAc(beta 1-found in the milk oligosaccharide disialyl LNT (the GlcNAc residue of the tetrasaccharide linked to lactose) and also of N-linked chains (GlcNAc linked to Man).
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