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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.

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Accession:CHEBI:30399 term browser browse the term
Definition:A nickel cation that has formula Ni.
Synonyms:exact_synonym: nickel(1+) ion;   nickel(I) cation
 related_synonym: Formula=Ni;   InChI=1S/Ni/q+1;   InChIKey=YWMAPNNZOCSAPF-UHFFFAOYSA-N;   Ni;   Nickel cation;   Nickel, ion (Ni1+);   SMILES=[Ni+]
 xref: CAS:14903-34-5;   Gmelin:15198

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Path 1
Term Annotations click to browse term
  CHEBI ontology 916
    role 875
      biological role 875
        biochemical role 748
          cofactor 130
            nickel cation 0
              nickel(1+) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 916
    chemical entity 916
      molecular entity 914
        elemental molecular entity 142
          monoatomic entity 87
            monoatomic ion 87
              monoatomic cation 81
                metal cation 81
                  transition element cation 41
                    nickel cation 0
                      nickel(1+) 0
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