Given the fact that ERM proteins involved in the plasma membrane localization of P-gp, a typical partner protein for ERM, vary according to the types of cancer, organ, and animal species [33,59,60,61,62,63], this discrepancy among the present and previous results may be attributed, at least in part, to the different expression profiles of ERM in cancer cell types. The gene discussed is PGP; the disease is cancer.