Among the SR proteins, SRSF1 (Anczukow et al., 2015), SRSF2 (Workenhe et al., 2016), SRSF3 (Gautrey et al., 2015), SRSF5, and SRSF6 (Kedzierska and Piekielko-Witkowska, 2017) have been shown to be highly expressed in breast cancer (Figure 3). Here, SRSF1 is linked to breast cancer.