FIG. 1.

Physical map of the N. gonorrhoeae chromosome showing genetic organization of the lbpBA operon region. The top line represents the restriction map of the cloned FA19 chromosome fragment. The organization of lbpBA genes including the direction of transcription as indicated by arrows is shown in the next line. Plasmid pUNCH192SB is a 1.1-kb Sau3AI fragment. Plasmids pUNCH142 and pUNCH127 contain 2.3-kb RsaI and 2.5-kb SspI fragments, respectively. The solid inverted triangle denotes the position of the aphA3 insertion in strain FA6965(pUNCH142), and the open inverted triangle denotes the position of the Ω insertion in strain FA6839(pUNCH127). L58 and L62 refer to the oligonucleotides used as probes in isolating the clones pUNCH142 and pUNCH192SB, respectively.