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The Chemical Entities of Biological Interest (ChEBI) ontology is downloaded weekly from EMBL-EBI at The data is made available under the Creative Commons License (CC 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.

Term:deuterium atom
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Accession:CHEBI:29237 term browser browse the term
Definition:The stable isotope of hydrogen with relative atomic mass 2.014102 and a natural abundance of 0.0115 atom percent (from Greek deltaepsilonupsilontauepsilonrhoomicronnu, second).
Synonyms:related_synonym: (2)1H;   (2)H;   D;   Deuterium;   Formula=D;   InChI=1S/H2/h1H/i1+1;   InChIKey=UFHFLCQGNIYNRP-OUBTZVSYSA-N;   SMILES=[2H];   deuterio;   heavy hydrogen;   hidrogeno pesado;   hydrogen-2;   schwerer Wasserstoff

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Path 1
Term Annotations click to browse term
  CHEBI ontology 0
    chemical entity 0
      molecular entity 0
        inorganic molecular entity 0
          hydrogen atom 0
            deuterium atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 0
    subatomic particle 0
      composite particle 0
        hadron 0
          baryon 0
            nucleon 0
              atomic nucleus 0
                atom 0
                  main group element atom 0
                    main group molecular entity 0
                      s-block molecular entity 0
                        hydrogen molecular entity 0
                          elemental hydrogen 0
                            monoatomic hydrogen 0
                              hydron 0
                                deuteron 0
                                  deuterium atom 0
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