FIG 4.

Synthetic AIP enhances agr expression in the absence of a functional electron transport chain. Shown are growth (A and D), P3 expression (B and E), and P3 expression corrected for growth (C and F) of SH1000 and derived strains (A to C) and USA300 and derived strains (D to F). (A to C) Wild-type S. aureus grown in the absence or presence of HQNO and that of a hemB::Tn mutant in TSB only or TSB supplemented with 1 μM or 10 μM sAIP. (D to F) Wild-type S. aureus and a hemB mutant grown in the absence or presence of 10 μM sAIP. The data represent the means of at least 4 independent experiments, each in triplicate. The error bars were omitted to enhance clarity but were all within 5% of the mean.