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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Dev Psychol. 2012 Mar 5;48(5):1463–1475. doi: 10.1037/a0027471

Table 1.

Genotype Frequencies by Ethnicity

5-HTTLPR genotype European
American		 African
American
5-HTTLPR genotype
    LL 138 (37.1%) 28 (43.8%)
    LS 169 (45.4%) 30 (46.9%)
    SS 65 (17.5%) 6 (9.4%)  
A/G-modified 5-HTTLPR genotype
    High TE 116 (31.6%) 17 (27.0%)
    Med TE 166 (45.2%) 30 (47.6%)
    Low TE 85 (23.2%) 16 (25.4%)
A/G-modified 5-HTTLPR alleles
    LA 402 (54.5%) 63 (50.0%)
    LG 40 (5.4%)   20 (15.9%)
    S 295 (40.0%) 43 (34.1%)

Note. Some individuals were missing one or both alleles. LL = long/long allele; LS = long/short allele; SS = short/short allele; TE = transcriptional efficiency; A/G = adenine/guanine.