]> definition imported from glycerone phosphate A ketose phosphate that consists of glycerone bearing a single phospho substituent. cholesterol A cholestanoid consisting of cholestane having a double bond at the 5,6-position as well as a 3beta-hydroxy group. lipopolysaccharide 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). deoxyribonucleic acid High molecular weight, linear polymers, composed of nucleotides containing deoxyribose and linked by phosphodiester bonds; DNA contain the genetic information of organisms. erythritol The meso-diastereomer of butane-1,2,3,4-tetrol. polysaccharide A biomacromolecule consisting of large numbers of monosaccharide residues linked glycosidically. This term is commonly used only for those containing more than ten monosaccharide residues. molecular entity Any constitutionally or isotopically distinct atom, molecule, ion, ion pair, radical, radical ion, complex, conformer etc., identifiable as a separately distinguishable entity. glycosylphosphatidylinositol nucleic acid A macromolecule made up of nucleotide units and hydrolysable into certain pyrimidine or purine bases (usually adenine, cytosine, guanine, thymine, uracil), D-ribose or 2-deoxy-D-ribose and phosphoric acid. macromolecule A macromolecule is a molecule of high relative molecular mass, the structure of which essentially comprises the multiple repetition of units derived, actually or conceptually, from molecules of low relative molecular mass. polyatomic entity Any molecular entity consisting of more than one atom. nucleotide A nucleotide is a nucleoside phosphate. It is a phosphate ester that has a nucleoside moiety and has at least one phosphate moiety attached to the C-5 carbon of the ribose or deoxyribose moiety. double-stranded DNA GM1 ganglioside A sialotetraosylceramide consisting of a branched pentasaccharide made up from one sialyl residue, two galactose residues, one N-acetylgalactosamine residue and a glucose residue at the reducing end attached to N-stearoylsphingosine via a beta-linkage. O-polysaccharide A repetitive glycan polysaccharide contained within a lipopolysaccharide (LPS). The O-antigen is attached to the core oligosaccharide, and comprises the outermost domain of the LPS molecule. oligonucleotide A nucleobase-containing molecular entity with an oligomeric structure comprised of a linear sequence of nucleotide residues. An oligonucleotide must contain at least 2 nucleotide residues and typically contains fewer than 30. single-stranded DNA