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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:carbon-13 atom
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Accession:CHEBI:36928 term browser browse the term
Definition:A carbon atom that has formula C.
Synonyms:related_synonym: (13)6C;   (13)C;   Formula=[13C];   InChI=1S/C/i1+1;   InChIKey=OKTJSMMVPCPJKN-OUBTZVSYSA-N;   SMILES=[13C];   carbon, isotope of mass 13;   carbon-13
 xref: CAS:14762-74-4

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19818
    chemical entity 19816
      atom 19816
        nonmetal atom 19749
          carbon atom 19698
            carbon-13 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19818
    subatomic particle 19816
      composite particle 19816
        hadron 19816
          baryon 19816
            nucleon 19816
              atomic nucleus 19816
                atom 19816
                  main group element atom 19761
                    p-block element atom 19761
                      carbon group element atom 19703
                        carbon atom 19698
                          carbon-13 atom 0
paths to the root