GC content of peaks called by only one laboratory. (A) For the CTCF HUVEC cell line, we formed four groups of peaks reported by the ENCODE portal. We split them into those called only in laboratory UW, those called only in laboratory Broad, those called only in laboratory UTA, and those called in all three. We computed the GC content for each of these peak regions, shown in four box plots. (B) As in A but after finding peaks with our algorithm.