title: The enterobacterial common-antigen, a cyclic polysaccharide.
abstract: Structural studies of the enterobacterial common-antigen, using chemical methods and fast-atom-bombardment mass spectrometry, indicate that it is a cyclic polysaccharide, composed of four, five, and, to a smaller extent, six trisaccharide repeating-units. In the structure of the antigen, given below, D-Fuc4NAc stands for 4-acetamido-4,6-dideoxy-D-galactose.
mesh_terms: D000942:Antigens, Bacterial / Q000302:isolation & purification*; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004755:Enterobacteriaceae / Q000276:immunology*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008745:Methylation
chemical_list: D000942:Antigens, Bacterial; C017286:enterobacterial common antigen