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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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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 19821
    role 19769
      biological role 19769
        biochemical role 19389
          cofactor 15547
            nickel cation 1569
              nickel(1+) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19821
    chemical entity 19821
      molecular entity 19819
        elemental molecular entity 16306
          monoatomic entity 15180
            monoatomic ion 15175
              monoatomic cation 14012
                metal cation 14012
                  transition element cation 9378
                    nickel cation 1569
                      nickel(1+) 0
paths to the root