Fig. 1From: Interplay of Val66Met and BDNF methylation: effect on reward learning and cognitive performance in major depressionOverview of BDNF methylation in the control group (grey) and the depression group (black). DNA methylation is presented as mean and standard error of the mean for each of the analysed regions: promoter Ia (A), promoter Ib (B), promoter IV (C) and exon IX (D). Methylation of each individual CpG as well as the average methylation levels across all CpGs are presented for each analysed region. Significance levels are derived from Mann–Whitney U test (*p < 0.05, **p < 0.01)Back to article page