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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:0000020 term browser browse the term
Definition:A region of double stranded RNA where the bases do not conform to WC base pairing. The loop is closed on both sides by canonical base pairing. If the interruption to base pairing occurs on one strand only, it is known as a bulge.
Synonyms:exact_synonym: RNA internal loop

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Path 1
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  SO ontology 0
    sequence_feature 0
      region 0
        biological_region 0
          sequence_motif 0
            nucleotide_motif 0
              RNA_motif 0
                RNA_internal_loop 0
                  asymmetric_RNA_internal_loop + 0
                  symmetric_RNA_internal_loop 0
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