ESR1 and breast cancer: To further address whether ART3 is correlated with TNBC breast cancers, we also investigated the expression of ART3 in a panel of 7 breast cancer cell lines including two TNBC (MDA-MB-231 and BT549), two ER-/Her2+ (SKBR3 and MDA-MB-453), one Her2+ (BT474), and two ER+/Her2- (MCF-7 and T47D) cell lines.