P-glycoprotein consumes energy derived from ATP hydrolysis to expel an extremely broad range of structurally and functionally unrelated cytotoxic agents out of cancer cells such as taxanes (e.g. paclitaxel and docetaxel), Vinca alkaloids (e.g. vinblastine, vincristine, vindesine, vinorelbine), epipodophyllotoxins (e.g. teniposide, etoposide) and anthracyclines (e.g. doxorubicin, daunorubicin, epirubicin, idarubicin) [8]. Here, ABCB1 is linked to cancer.