title: On the antiquity of introns.
mesh_terms: D000818:Animals; D001230:Aspergillus / Q000235:genetics; D001483:Base Sequence; D005075:Biological Evolution; D004247:DNA / Q000235:genetics; D005796:Genes; D009154:Mutation; D010944:Plants / Q000235:genetics; D012313:RNA / Q000235:genetics; D014305:Triose-Phosphate Isomerase / Q000235:genetics; D014714:Vertebrates / Q000235:genetics
chemical_list: D012313:RNA; D004247:DNA; D014305:Triose-Phosphate Isomerase