Table 4.

Accumulation of organic solvents in E. coli cells in a two-phase system

Strain
	n-Heptane	n-Hexane	Cyclohexane
JA300	0.060 ± 0.002	0.54 ± 0.01	1.3 ± 0.1
JA300 acrRIS	0.051 ± 0.037	NDb	1.2 ± 0.1
JA300 marR	0.049 ± 0.010	NDb	1.0 ± 0.1
JA300 acrRIS marR	0.0010 ± 0.0006	0.10 ± 0.01	0.29 ± 0.01
CH7	0.0033 ± 0.0002	0.11 ± 0.01	0.39 ± 0.01

^aE. coli strains grown in LBGMg medium were exposed to organic solvents in the two-phase system and incubated for 30 min as described in Materials and Methods. Values indicate means of results and standard deviations of results from three independent experiments.

^bND, not determined.