From an analysis of many TF-ChIP data sets, TF-TF interactions were predicted on the basis of regular DNA sequence motif arrangements. 27 predicted TF-TF interactions were tested using a pull down assay that measures the \'Luminescence Intensity Ratio\'. A cut-off of 7 was used, well above values for six negative controls.

Interaction in vitro; bait produced by coupled in vitro translation; prey produced by coupled in vitro translation.