. 2011 Mar 24;6(3):e17350. doi: 10.1371/journal.pone.0017350

Table 1. β-Galactosidase activities of mphK promoter-, mphR promoter-, or mphX promoter-lacZ transcriptional fusion in A. calcoaceticus PHEA-2 and mphR- and mphX-deletion mutants (A2R and A2X).

	β-Galactosidase activity (Miller unit)^a
	+Phenol	−Phenol
PHEA-2(P_mphK-lacZ)	336±33	34±2
A2R(P_mphK-lacZ)	^*	^*
A2X(P_mphK-lacZ)	807±58	30±2
PHEA-2(P_mphR-lacZ)	160±20	92±10
A2R(P_mphR-lacZ)	20±5	21±3
A2X(P_mphR-lacZ)	225±33	176±15
PHEA-2(P_mphX-lacZ)	332±50	^*
A2R(P_mphX-lacZ)	^*	^*
A2X(P_mphX-lacZ)	^*	^*

Cells were grown in the presence (+) or absence (−) of 2.0 mM phenol and assayed for β-galactosidase activities as described in Materials and Methods. Values shown are means ± standard deviation of triplicate experiments.

*No detectable activity.