The role of ABCG2 was further analyzed by Mo et al., where it was determined that in ID8 murine ovarian cancer cells, the inhibition of ABCC2 and ABCG2 via small molecule drugs MK-571 and Novobiocin decreased the efflux of Rhodamine 123, a tracer dye that can bind to ABC transporters [45]. Here, ABCG2 is linked to ovarian carcinoma.