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.
An organic anionic group obtained by deprotonation of the sulfanylcarbonyl and phosphate OH groups of S-[1-(5-O-phosphono-beta-D-ribofuranosyl)-5-(sulfanylcarbonyl)pyridinium-3-carbonyl]-L-cysteine residue.