Positive association between average motif spacing and flexibility of motif dimers. Left column: predictions in K562 ChIP-seq peaks, right column: combined predictions from UW and Duke DNase-seq data. Upper row: sunflower plots show the number of predicted motif spacings for a group of dimer predictions as a function of the average of their motif spacings. In case of data points occurring more than once, their count is indicated by the number of petals (orange lines). Lower row: sunflower plots show the standard deviation of predicted motif spacings as a function of average motif spacing. The Pearson correlation coefficients are shown for all plots.