title: Evolutionary origin of SL-addition trans-splicing: still an enigma.
authors.forename: T W
authors.initials: TW
authors.lastname: Nilsen
mesh_terms: D000818:Animals; D019143:Evolution, Molecular; D009348:Nematoda / Q000235:genetics / Q000378:metabolism; D010802:Phylogeny; D012322:RNA Precursors / Q000378:metabolism; D020038:RNA, Spliced Leader / Q000378:metabolism*; D017411:Ribonucleoproteins, Small Nuclear / Q000502:physiology; D017423:Sequence Analysis, RNA; D020040:Trans-Splicing
chemical_list: D012322:RNA Precursors; D020038:RNA, Spliced Leader; D017411:Ribonucleoproteins, Small Nuclear