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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:0001908 term browser browse the term
Definition:A sequence variant that causes the extension of a genomic feature from within the feature rather than from the terminus of the feature, with regard to the reference sequence.
Synonyms:exact_synonym: Jannovar:internal_feature_elongation;   internal feature elongation

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Path 1
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  SO ontology 0
    sequence_variant 0
      structural_variant 0
        feature_variant 0
          feature_elongation 0
            internal_feature_elongation 0
              frameshift_elongation 0
              inframe_insertion + 0
paths to the root