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 derivative consisting of a chain of 2-acetamido-2-deoxy-beta-D-galactopyranose units joined together by (1->6)-glycosidic linkages, with each unit substituted by a beta-D-glucopyranuronic acid, attached by a (1->3) linkage.