Table 2 Overview of SNPs of CYP2A13 gene detected in 45 NPC cases

1

74 G>A

Arg25Gln

7.8

G/A

G/A

A/A

2

281 A>G

Intron

3.3

A/G

A/G

A/G

3

396 A>G

Intron

3.3

A/G

A/G

A/G

4

419 G>A

Intron

3.3

G/A

G/A

G/A

5

424 G>A

Intron

3.3

G/A

G/A

G/A

6

441 C>T

Intron

3.3

C/T

C/T

C/T

7

578 C>T

Arg101OPA

1.1

C/T

8

672 C>A

Intron

3.3

C/A

C/A

C/A

9

742 T>C

Intron

1.1

T/C

10

760 T>C

Intron

1.1

T/C

11

761 C>T

Intron

1.1

C/T

12

867 C>G

Intron

1.1

C/G

13

1757 A>G

Intron

7.8

A/G

A/G

G/G

14

1634–1635 ins ACC

133–134 Thr ins

/ins ACC

15

1801 G>C

Intron

1.1

G/C

16

1970 A>C

synonym

1

A/C

17

3375 C>T

Arg257Cys

7.8

C/T

C/T

T/T

18

5530 T>C

Intron

1.1

T/C

19

5578 A>C

Intron

1.1

A/C

20

6958 C>T

Intron

3.3

C/T

C/T

C/T

21

7233 T>G

Intron

12.2

T/G

T/G

T/G

G/G

T/G

G/G