Interestingly, as a protein interacting with FOXA2, FOXP2 showed the highest correlation with FOXA2 in the basal subtype (see Figures 1H, I), which was the most lethal subtype with a high degree of metastasis ability associated with mesenchymal characteristics (54), implicating that the two proteins played important roles together in this subtype of breast cancer. This evidence concerns the gene FOXP2 and breast cancer.