Table 1. 50% inhibitory concentrations (IC₅₀) for wild type and mutant derivatives.

	Etoposide (µg/ml)	Doxorubicin (µg/ml)
WT	40	5
H759P	180	12
M762P	100	8
T767P	32	5
N770P	150	7
Q773P	28	5
N774P	38	3
H759A	230	5