Table 2.
Description of polymorphisms tested.
| Gene | SNP | SNP Location | Alleles | Minor (AA Freq.) | Minor (Cauc Freq.) | Minor (Hisp Freq.) |
|---|---|---|---|---|---|---|
| DRD1 | rs4532 | Exon 1 (5'UTR) | C/T | C (0.19) | C (0.36) | C (0.27) |
| DRD1 | rs686 | Exon 4 (3'UTR) | A/G | A (0.37) | G (0.43) | G (0.41) |
| DRD1 | rs265978 | 3.7 kb downstream | C/T | C (0.37) | C (0.43) | C (0.38) |
| DRD1 | rs265975 | 5.5 kb downstream | C/T | C (0.46) | T (0.25) | T (0.35) |
| DRD1 | rs265973 | 7 kb downstream | C/T | T (0.42) | T (0.34) | T (0.30) |
| DRD2 | rs12364283 | Promoter (1kb upstream) | A/G | G (0.02) | G (0.10) | G (0.10) |
| DRD2 | rs2283265 | Intron 5 | A/C | A (0.12) | A (0.16) | A (0.22) |
| DRD2 | rs1076560 | Intron 6 | A/C | A (0.12) | A (0.18) | A (0.22) |
| DRD2 | rs6277 | Exon 7 (C957T) | A/G | A (0.14) | G (0.41) | G (0.44) |
| DRD2/ANKK1 | rs1800497 | 10kb downstream | A/G | A (0.31) | A (0.22) | A (0.25) |
Minor alleles and allele frequencies are with respect to the non-substance using population within each subset. Abbreviations: DRD1, dopamine D1 receptor; DRD2, dopamine D2 receptor; Freq: frequency; kb: kilobase; UTR: untranslated region.