TABLE 2.

Frequency of resistant-colony formation in the presence of HCV inhibitors and neomycin

No. of cells and frequencya	No. of colonies
	A-782759	BILN-2061	A-782759 + BILN-2061
	10b	10	5 + 5         10 + 10
2 × 104 cells	123	10	0        0
2 × 105 cells	NDc	ND	21
Frequency (%)	0.62	0.05	0.001        0.0005

^aFrequency was calculated using equation: “number of colonies observed / the number of initial cells used × 100”.

^bMultiple of IC₅₀.

^cND, not done.