TABLE 2.

Effect of mgrA overexpression on susceptibility to NorA substrates

Drug	MIC (μg/ml) for strain and plasmidb:
	SH1000		SA-K2124a		ISP794		Newman
	pCU1	pK404	pCU1	pK404	pCU1	pK404	pCU1	pK404
Acriflavine	12.5	6.25 (2)	6.25	6.25	3.13	3.13	6.25	6.25
BACc	1.25	1.25	0.63	0.63	0.63	0.63	1.25	1.25
Cetrimide	0.31	0.31	0.31	0.31	0.31	0.16 (2)	0.63	0.16 (4)
Ethidium bromide	6.25	6.25	3.13	3.13	1.56	1.56	6.25	3.13 (2)
Norfloxacin	1.25	0.63 (2)	0.63	0.63	0.63	0.31 (2)	0.31	0.16 (2)
Rhodamine	0.63	0.63	0.31	0.31	0.31	0.31	0.63	0.63
TPPd	25	25	12.5	12.5	6.25	3.13 (2)	12.5	12.5

^aSH1000 norA::lacZ.

^bNumbers in parentheses are reductions (n-fold) in MICs.

^cBAC, benzalkonium chloride.

^dTPP, tetraphenylphosphonium bromide.