title: Precursors of ribosomal RNA.
mesh_terms: D001483:Base Sequence; D004926:Escherichia coli / Q000378:metabolism; D012329:RNA, Bacterial / Q000096:biosynthesis*; D012335:RNA, Ribosomal / Q000096:biosynthesis; D012270:Ribosomes / Q000378:metabolism*
chemical_list: D012329:RNA, Bacterial; D012335:RNA, Ribosomal