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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 19812
    role 19763
      biological role 19763
        biochemical role 19380
          cofactor 15785
            nickel cation 1571
              nickel(1+) 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 19812
    chemical entity 19812
      molecular entity 19811
        elemental molecular entity 16463
          monoatomic entity 15462
            monoatomic ion 15458
              monoatomic cation 14391
                metal cation 14391
                  transition element cation 9387
                    nickel cation 1571
                      nickel(1+) 0
paths to the root