Table 4.

RFF based on the accumulation of ethidium bromide for each mutant strain compared to that for wild-type strain H37Rv^a

Strain	RFF at the following ethidium bromide concn (μg/ml):
	0.125	0.25	0.5	1	2
MmrKO	0.07	0.47	0.53	0.62	0.55
MmrKO::pCRS5	− 0.21	−0.16	−0.20	−0.25	−0.11
H37Rv:pCVZ2	−0.20	−0.20	−0.38	−0.53	−0.58

^aThe values correspond to the last point of measurement at 60 min, when fluorescence had reached a steady state. Data correspond to the averages of three independent assays.