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.
Poly(ether) macoromolecule comprising a branched nonyl group bonded to one of the ring positions in 2-[phenoxypoly(ethoxy)]ethanol. A commericially available detergent, it is used to help crystallise proteins and extract the cytoplasmic contents of cellular culture.