FIG 6.

Agr activation by sAIP does not promote hemolytic activity in the absence of a functional electron transport chain. (A) Hemolytic activities of culture supernatants of wild-type SH1000 grown in the absence or presence of HQNO and of a hemB::Tn mutant in the absence (open bars) or presence (filled bars) of 10 μM sAIP. (B) Hemolytic activities of culture supernatants of wild-type USA300 and a hemB mutant in the absence (open bars) or presence (filled bars) of 10 μM sAIP. The data represent the mean averages of 4 experiments performed in triplicate, and the error bars represent the standard deviations of the mean. None of the values obtained from cultures containing sAIP were significantly different from those without sAIP at identical dilutions.