title: Blood group specific oligosaccharides from faeces of a blood group A breast-fed infant.
abstract: Four different oligosaccharides were isolated from faeces collected from a blood group A, secretor, breast-fed infant. Three of these, GalNAc alpha 1-3[Fuc alpha 1-2]Gal beta 1-4Glc (A-tetrasaccharide), GalNAc alpha 1-3[Fuc alpha 1-2]Gal beta 1-4[Fuc alpha 1-3]Glc (A-pentasaccharide) and 1-3[Fuc alpha 1-4]GlcNAc beta 1-3Gal beta 1-4Glc (A-heptasaccharide) have previously found in urine, whereas GalNAc alpha 1-3[Fuc alpha 1-2]Gal beta 1-3GlcNAc beta 1-3Gal beta 1-4Glc (A-hexasaccharide) is a new compound. Structures were deduced by mass spectrometry of permethylated and N-trifluoroacetylated oligosaccharide alditols. The latter gave more structural information than the corresponding N-acetyl derivatives. The four oligosaccharides were tested for blood group A activity and all were found to inhibit the binding of anti-A antibody to blood group A substance.
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology; D001667:Binding, Competitive; D001942:Breast Feeding; D002850:Chromatography, Gel; D005243:Feces / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007231:Infant, Newborn; D008745:Methylation; D009844:Oligosaccharides / Q000032:analysis* / Q000276:immunology / Q000302:isolation & purification
chemical_list: D000017:ABO Blood-Group System; D009844:Oligosaccharides