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The Sequence Types and Features Ontology (SO) is downloaded weekly from the SourceForge CVS repository at For more information about this ontology, see the Sequence Ontology Home Page at

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Accession:SO:0000409 term browser browse the term
Definition:A biological_region of sequence that, in the molecule, interacts selectively and non-covalently with other molecules. A region on the surface of a molecule that may interact with another molecule. When applied to polypeptides: Amino acids involved in binding or interactions. It can also apply to an amino acid bond which is represented by the positions of the two flanking amino acids.
Comment:See GO:0005488 : binding.
Synonyms:exact_synonym: INSDC_feature:misc_binding;   binding site;   binding_or_interaction_site
 related_synonym: site
 alt_id: BS:00033
 xref: "wiki"

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  SO ontology 0
    sequence_feature 0
      region 0
        biological_region 0
          binding_site 0
            epitope 0
            homologous_chromosome_recognition_and_pairing_locus 0
            ligand_binding_site + 0
            metal_binding_site + 0
            nucleotide_binding_site + 0
            protein_binding_site + 0
paths to the root