non_LTR_retrotransposon Penelope_retrotransposon SO:0002290 Penelope is a subclass of non_LTR_retrotransposons (SO:0000189). Penelope retrotransposons contains structural features of TR, RT, EN, TR, terminal repeats which can be in tandem or inverse orientation in different Penelope copies. RT is reverse transcriptase. EN is endonuclease. Penelope retrotransposon 2020-06-25T14:00:30Z Added as per GitHub Issue Request #488 (https://github.com/The-Sequence-Ontology/SO-Ontologies/issues/488) sequence david RPP retrotransposon