title: Factor necessary for ribosomal RNA synthesis.
mesh_terms: D001426:Bacterial Proteins; D002501:Centrifugation, Zonal; D004926:Escherichia coli; D005815:Genetic Code; D012316:RNA Nucleotidyltransferases; D012329:RNA, Bacterial / Q000096:biosynthesis*; D012270:Ribosomes / Q000378:metabolism*
chemical_list: D001426:Bacterial Proteins; D012329:RNA, Bacterial; D012316:RNA Nucleotidyltransferases