CYP1B1 and breast cancer: To identification the function of CYP1B1 in breast cancer, as shown in Figure 5A, GSEA analysis indicated that CYP1B1 was significantly associated with epithelial mesenchymal transition (NES = 2.625, FDR = 7.6 × 10−10), angiogenesis (NES = 2.169, FDR = 9.2 × 10−6), and regulation of the immune response (NES = 2.713, FDR = 3.1 × 10−9) and circadian rhythm (NES = 0.822, FDR = 8.5 × 10−1).