The MarR Repressor of the Multiple Antibiotic Resistance (mar) Operon in Escherichia coli: Prototypic Member of a Family of Bacterial Regulatory Proteins Involved in Sensing Phenolic Compounds

Table 1 Regulation of marR-lacZ by MarR and MprA

		β-Galactosidase Activity Following Induction with:
Plasmid	Background^a	No Addition	SAL^b
None	WT	15	300
None	Δmar	420	730
pmarR	Δmar	5	150
pmprA	Δmar	10	250

^aAll experiments were performed in strain B318 except for the first entry, which was in an isogenic strain containing a wild-type mar locus.
^bSAL, sodium salicylate.

ISSN: 1528-3658