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 copolymer macromolecule composed of homopolymeric blocks of 1->4-linked homopolymeric blocks of 1->4-linked sodium beta-D-mannuronate and sodium alpha-L-guluronate residues, covalently linked together in different sequences or blocks. The sodium salt of alginic acid.