To profile the genome-wide binding sites of ZFX, we performed two biological ZFX ChIP-seq replicates using chromatin from HEK293T kidney, HCT116 colon, C4-2B prostate, and MCF-7 breast cancer cells (Fig. 1A; see Supplemental Fig. S1 for ZFX antibody validation and Supplemental Table S1 for access information for all genomic data sets). This evidence concerns the gene ZFX and breast cancer.