1 4 0 http://purl.obolibrary.org/obo/OPMI_0000423 viroid 'viroid' SubClassOf 'acellular self-replicating organic structure' 'viroid' SubClassOf http://purl.obolibrary.org/obo/OPMI_0000623 http://purl.obolibrary.org/obo/OPMI_0000623 mobile genetic element 'mobile genetic element' SubClassOf 'self-replicating nucleic acid' http://purl.obolibrary.org/obo/OPMI_0000624 plasmid 'plasmid' SubClassOf 'mobile genetic element' http://purl.obolibrary.org/obo/OPMI_0000621 self-replicating nucleic acid 'self-replicating nucleic acid' SubClassOf 'acellular self-replicating organic structure' http://purl.obolibrary.org/obo/OPMI_0000625 transposon 'transposon' SubClassOf 'mobile genetic element'