Figure 2From: No direct effect of the -521 C/T polymorphism in the human dopamine D4 receptor gene promoter on transcriptional activitySchematic representation depicting the location of the six 5' deletion mutant variants in the DRD4 gene promoter (pDRD4-A, B, C, D, E and F). The putative repressor region is indicated by a shaded box. The localization of several important SNPs and the 120 bp duplication region are also shown. The arrow at -501 denotes the transcription start site.Back to article page