Comparison of gene arrangements in human Neisseriae. The N. subflava sequence (accession number AJ581792 in the EMBL database) is displayed in alignment with corresponding parts from other Neisseria species. Open reading frames are visualized as colored block arrows (the tip of each arrow symbolizing the stop codon) and labeled with their designations according to the text. Non-coding regions are visualized as solid lines. The dedA gene and the Correia element in N. subflava were only partially sequenced. The symbol // means that 13 kb sequence separating tyrB from dedA has been omitted in the figure. The intergenic regions are defined by dotted vertical lines and designated TC (tyrB-cyt5), DM (dedA-manB), MF (manB-folP) and FU (folP-upstream), respectively.