title: Primary structure homology within the 23S ribosomal RNA.
mesh_terms: D001665:Binding Sites; D055598:Chemical Phenomena; D002621:Chemistry; D004926:Escherichia coli / Q000166:cytology*; D005827:Genetics, Microbial; D008967:Molecular Biology; D012329:RNA, Bacterial; D012270:Ribosomes; D014461:Ultracentrifugation
chemical_list: D012329:RNA, Bacterial