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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:sulfo group
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Accession:CHEBI:29922 term browser browse the term
Synonyms:exact_synonym: hydroxydioxo-lambda(6)-sulfanyl;   hydroxysulfonyl;   sulfo
 related_synonym: -S(O)2(OH);   Formula=HO3S;   SMILES=S(=O)(O)(*)=O
 xref: PDBeChem:SFO

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    Path 1
    Term Annotations click to browse term
      CHEBI ontology 19876
        chemical entity 19905
          group 19832
            inorganic group 19408
              sulfo group 9080
                organosulfonic acid + 9080
    Path 2
    Term Annotations click to browse term
      CHEBI ontology 19876
        subatomic particle 19874
          composite particle 19874
            hadron 19874
              baryon 19874
                nucleon 19874
                  atomic nucleus 19905
                    atom 19905
                      main group element atom 19821
                        p-block element atom 19821
                          chalcogen 19570
                            oxygen atom 19543
                              oxygen molecular entity 19543
                                hydroxides 19342
                                  oxoacid 18721
                                    chalcogen oxoacid 13420
                                      sulfur oxoacid 13169
                                        sulfonic acid 10963
                                          sulfo group 9080
                                            organosulfonic acid + 9080
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