ESRP1 and breast cancer: Specifically, the expression levels of both genes were correlated with the fraction of genome altered (p < 0.0001), particularly for ESRP1 (rho = 0.50, p < 0.0001) (Figure 1b), and were higher in luminal B tumors compared to the other BC subtypes (p < 0.0001) (Supplementary Materials Figure S1b).