Figure 2.

Two histograms showing the distributions of the score of context in the -28 bp/+33 bp flanks of real HNF4α sites (gray bars, see also test set; Additional data file 1) versus the -28 bp/+33 bp flanks of PWM matches (PWM score >0.8) in random genomic positions (white bars). Mean values of the two distributions are 0.5849 and 0.348, respectively. The x-axis gives the score of context; the left y-axis gives the number of PWM matches in random genomic positions with the corresponding score of context; and the right y-axis gives the number of real HNF4α sites with the corresponding score of context.