Table 1.

IC₅₀ of daunomycin (DNM), buthionine sulfoximine (BSO) and verapamil (VRP)

	BHK/CFTR	BHK/MRP1	H69	H69AR
DNM (nM)	1.9 ± 0.1*	13.9 ± 0.8	85.3 ± 7.0	1362.2 ±262.1
BSO (µM)	21.5 ± 3.5	20.8 ±9.6	290.8 ± 30.8	11.3 ± 1.4
VRP (µM)	35.4 ± 6.6	3.1 ±0.8	55.5 ± 6.6	42.4 ±3.6

^*The expeiriments were performed in triplicate and repeated twice.