Table 2 Amino acid mutations at residues 120 and/or 121 that confer resistance to penicillin and tetracycline in N. gonorrhoeae.
porB | Lys (120) | Asp-Asp (120–121) | Asp (120 or 121) | Other AA (120 or 121) | Total |
|---|---|---|---|---|---|
R strains | 24 | 0 | 0 | 0 | 24 (100%) |
S strains | 15 | 0 | 2 | 7 | 17 (70.8%) |