LTR_retrotransposon LARD 2020-05-27T15:47:30Z large_retrotransposon_derivative sequence SO:0002260 Added as per GitHub Issue Request #429 (https://github.com/The-Sequence-Ontology/SO-Ontologies/issues/429) Large Retrotransposon Derivative david Large Retrotransposon Derivative elements are long-terminal repeats that contain reverse transcriptase priming sites and are conserved in sequence but contain no open reading frames encoding typical retrotransposon proteins . The LARDs identified in barley and other Triticeae have LTRs ~5.5 kb and an interal domain of ~3.5 kb. LARDs lack coding domains and thus do not encode proteins.