To study the effect of RASSF1C oncoprotein (EV1A) in breast cancer, we employed MCF7 and MDA‐MB‐231 cell lines, both lacking expression of the tumor suppressor isoform RASSF1A, as shown in reports from our and other groups (Montenegro et al, 2012; Vlahov et al, 2015; Calanca et al, 2019; Chatzifrangkeskou et al, 2019). Here, RASSF1 is linked to breast cancer.