title: The spliceosomal catalytic core arose in the RNA world… or did it?
abstract: A new study adds to the evidence for a common evolutionary origin of the spliceosome and group II introns, but RNA-world questions remain.
authors: W Ford
authors: WF
authors: Doolittle
mesh_terms: D019143:Evolution, Molecular; D007438:Introns; D012313:RNA / Q000378:metabolism*; D017381:Spliceosomes / Q000235:genetics*
chemical_list: D012313:RNA