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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:0002272 term browser browse the term
Definition:Long interspersed element-1 (LINE-1) elements are found in the human genome, which contains ORF1 (open reading frame1, including CC, coiled coil; RRM, RNA recognition motif; CTD, carboxyl-terminal domain) and ORF2 (including EN, endonuclease; RT, reverse transcriptase; C, cysteine-rich domain). The L1-encoded proteins (ORF1p and ORF2p) can mobilize nonautonomous retrotransposons, other noncoding RNAs, and messenger RNAs.
Comment:Added as per GitHub Issue Request #488 (
Synonyms:exact_synonym: L1 LINE retrotransposon;   L1 element;   LINE 1 element

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  SO ontology 0
    sequence_feature 0
      region 0
        biological_region 0
          mobile_genetic_element 0
            integrated_mobile_genetic_element 0
              transposable_element 0
                retrotransposon 0
                  non_LTR_retrotransposon 0
                    LINE_element 0
                      L1_LINE_retrotransposon 0
                        LINE1_deletion 0
                        LINE1_insertion 0
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