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Table 1 DRD4 VNTR allele and genotype frequencies; percentages do not always add to 100 due to rounding error.

From: Effects of craving and DRD4 VNTR genotype on the relative value of alcohol: an initial human laboratory study

Allele/genotype

n

%

Allele

  

2

8

11.4

3

3

4.3

4

46

65.7

5

1

1.4

6

0

0

7

11

15.7

8

0

0

9

1

1.4

Total

70

99.5

Genotype

  

2-2

1

2.9

4-2

4

11.4

7-2

2

5.7

4-3

2

5.7

7-3

1

2.9

4-4

16

45.7

5-4

1

2.9

7-4

6

17.1

9-4

1

2.9

7-7

1

2.9

Total

35

100.1

Genotype Classification

  

DRD4-L

11

31.4

DRD4-S

24

68.6

Total

35

100

  1. DRD4-L subjects have at least one allele that is 7 repeats or longer; DRD4-S participants have both alleles shorter than 7 repeats.
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Behavioral and Brain Functions

ISSN: 1744-9081

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