GATA3 and breast cancer: We identified 45 protein-coding genes (Supplemental Table 9) that were co-upregulated by GT3-INCP and GATA3 and significantly upregulated in luminal A BC compared with normal breast tissues, and harbored at least 1 common GT3-INCP/GATA3 binding site within a 40-kb window (–30 kb to +10 kb) around their transcription start sites (Fisher’s exact test, P < 1 × 10–6; Figure 7B).