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Table 2 G120 and A121 mutations in PorB1A and PorB1B of N. gonorrhoeae isolates*

From: Predominant porB1A and porB1B genotypes and correlation of gene mutations with drug resistance in Neisseria gonorrhoeae isolates in Eastern China

Serotypes

Cases (n)

Site mutation patterns (n)

  

G120K/A121D

G120K/A121G

G120N/A121D

G120D/A121G

G120D

G120K

G120N

A121G

IB3

56

56

0

0

0

0

0

0

0

IB3/6

46

27

19

0

0

0

0

0

0

IB4

25

0

0

0

0

25

0

0

0

IB3/6-IB2

62

44

0

9

0

0

9

0

0

IB3/6-IB2#

15

0

0

0

0

0

0

15

0

IB2-IB4-IB2

8

8

0

0

0

0

0

0

0

IA6

98

0

0

0

87

0

0

0

11

Total

310

135

19

9

87

25

9

15

11

  1. *: 5 isolates (3 for IB3/6 and 2 for IB3 serotypes) without G120 and A121 mutations not included. G, K, A, D and N indicate glycine, lysine, aspartic acid and asparagine, respectively. #: isolates with deletions of both A121 and N122.