The binding of leronlimab to endogenous CCR5 was next assessed by FACS comparing the binding of APC-labeled commercial CCR5 antibody (FAB1802A) with Alex fluor 488-labeled leronlimab in two human breast cancer cell lines (MD-MB-231 and SUM-159 (Supplemental Figure 1 (see Additional file 1)). The gene discussed is CCR5; the disease is breast cancer.