To further explore the relationship between ZNF750 and RAC1, we tested RAC1 expression by qPCR in several breast cancer cell lines characterized by different ZNF750 expression levels: MDA-MB-468 (high expression), MDA-MB-453 (high expression), MCF7 (moderate expression) and MDA-MB 231 (low expression). Here, ZNF750 is linked to breast cancer.