Idealized representation of binding results. Band intensities are corrected for affinity of binding as determined in competition assays and summarized in Table 2. Binding interactions that were only detected by competition assays are not shown here, but are listed in Table 2. The unlabeled complex observed below some of the GATA bands is a subband that often accompanies GATA-1 binding.31-33 Sp1a (FP15) is a subband that accompanies Sp1 binding³³; this band comigrates with but is distinct from CSBP-2.