A study used breast cancer cell lines with different metastatic potentials, including human MDA-MB-231 (bone and lung metastatic sublines) and mouse 4T1 (non-metastatic and lung metastatic sublines), to show that ABCC5 expression is highest in bone metastatic cells (Mourskaia et al., 2012). Here, ABCC5 is linked to breast carcinoma.