has part has disposition lipopolysaccharide http://purl.obolibrary.org/obo/chebi.owl LPS (axiom editor) Shane Babcock This is an inferred subclass of 'virulence factor' and 'endotoxin'. Liposaccharide natural compounds consisting of a trisaccharide repeating unit (two heptose units and octulosonic acid) with oligosaccharide side chains and 3-hydroxytetradecanoic acid units (they are a major constituent of the cell walls of Gram-negative bacteria). polysaccharide liposaccharide lipid A O-polysaccharide LPS core virulence factor disposition toxin disposition endotoxin disposition