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Table 2 Genotypes and allele frequencies of the -521 CT SNP in different populations

From: The polymorphic nature of the human dopamine D4 receptor gene: A comparative analysis of known variants and a novel 27 bp deletion in the promoter region

Origin of population

Allele frequency (%)

Genotype frequency (%)

  

2N

C

T

N

CC

CT

TT

Caucasian

Hungarian (Szantai et al., 2005)

1196

46.5

53.5

598

21.4

50.0

28.6

 

European-mixed (Barr et al., 2001)

308

45.8

54.2

154

   
 

German (Strobel et al., 2003)

230

40.0

60.0

115

20.9

38.3

40.8

 

Swedish (Jönsson et al., 2001)

776

42.0

58.0

388

15.0

54.0

31.0

 

mean

 

44.4

55.6

 

19.1

50.2

30.7

 

Standard deviation

 

2.4

2.4

 

3.0

4.5

3.6

Asian

Japanese (Okuyama et al., 1999)

538

41.0

59.0

269

14.0

53.0

33.0

 

Japanese (Ishiguro et al., 2000)

538

41.0

60.0

269

14.0

53.0

33.0

 

Japanese (Mitsuyasu et al., 1999)

294

41.0

59.0

147

17.9

46.3

35.8

 

Japanese (Okuyama et al., 2000)

172

53.5

46.5

86

32.5

41.9

25.6

 

Chinese (Xing et al., 2003)

412

39.1

60.9

206

12.1

53.9

34.0

 

Chinese (Li et al., 2000)

422

40.3

59.7

211

27.5

25.6

46.9

 

Korean (Lee et al., 2003)

202

46.0

54.0

101

   
 

mean

 

41.8

58.4

 

17.9

46.7

35.5

 

Standard deviation

 

3.5

3.6

 

6.7

10.4

5.8

American

Afro-American (Bookman et al., 2002)

142

55.0

45.0

71

32.0

42.0

26.0