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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:selenium-77 atom
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Accession:CHEBI:52457 term browser browse the term
Definition:A stable isotope of selenium with relative atomic mass 76.919915, 7.60 atom percent natural abundance and nuclear spin 1/2.
Synonyms:related_synonym: (77)34Se;   Formula=[77Se];   InChI=1S/Se/i1-2;   InChIKey=BUGBHKTXTAQXES-YPZZEJLDSA-N;   SMILES=[77Se];   Se-77;   selenium, isotope of mass 77;   selenium-(77)Se;   selenium-77
 xref: Chemspider:9507361;   PMID:16158304;   PMID:23159557;   PMID:25848959;   PMID:25923042;   PMID:27129100;   PMID:30828921;   PMID:32453871;   PMID:34153173

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Term paths to the root
Path 1
Term Annotations click to browse term
  CHEBI ontology 916
    chemical entity 916
      atom 901
        nonmetal atom 860
          selenium atom 17
            selenium-77 atom 0
Path 2
Term Annotations click to browse term
  CHEBI ontology 916
    subatomic particle 901
      composite particle 901
        hadron 901
          baryon 901
            nucleon 901
              atomic nucleus 901
                atom 901
                  main group element atom 870
                    p-block element atom 867
                      chalcogen 832
                        selenium atom 17
                          selenium-77 atom 0
paths to the root