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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:30213 term browser browse the term
Definition:Atom-like particle consisting of a positive muon and an electron.
Synonyms:related_synonym: Formula=Mu;   Mu;   SMILES=[*];   mu(+)e(-)

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  CHEBI ontology 19876
    subatomic particle 19874
      fundamental particle 19874
        lepton 19874
          electron 19874
            muonium 0
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