The expression of AnxA1 and its receptors, FPR1 and FPR2, was assessed in a non-tumorigenic breast cell line (MCF-10A), in ER-positive BC cell line (MCF-7), in HER2-positive cell line (MDA-MB-453), and TNBC cell lines (MDA-MB-231, MDA-MB-157, and BT-459). The gene discussed is FPR2; the disease is breast cancer.