The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at http://www.ebi.ac.uk/chebi/. The data is made available under the Creative Commons License (CC BY 3.0, http://creativecommons.org/licenses/by/3.0/). For more information see: Degtyarenko et al. (2008) ChEBI: a database and ontology for chemical entities of biological interest. Nucleic Acids Res. 36, D344–D350.
A polysaccharide that is alpha-D-Manp-(1->3)-[beta-D-Manp-(1->6)]-beta-D-Manp-(1->4)-beta-D-GlcpNAc-(1->4)-beta-D-GlcpNAc in which a hydroxy group in one of the terminal mannose moieties has been converted into the corresponding Neu5Ac-(1->?)-?-D-Gal-(1->?)-?-D-GlcNAc-(1->?)- glycoside, while two of the hydroxy groups on the other terminal mannose moiety have each been converted into the corresponding Neu5Ac-(1->?)-?-D-Gal-(1->?)-?-D-GlcNAc-(1->?)- glycoside. For the structure shown, either one of the R1 atoms and two of the R2 atoms represent Neu5Ac-(1->?)-?-D-Gal-(1->?)-?-D-GlcNAc-(1->?)- groups or vice versa; the remaining R1 and R2 atoms are hydrogens.