title: Speculations on RNA splicing.
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D005796:Genes; D009694:Nucleic Acid Precursors / Q000378:metabolism; D012333:RNA, Messenger / Q000096:biosynthesis*; D012343:RNA, Transfer / Q000096:biosynthesis*
chemical_list: D009694:Nucleic Acid Precursors; D012333:RNA, Messenger; D012343:RNA, Transfer