FIG 5 .

Swarming P. mirabilis HI4320 is resistant to inhibitory sodium azide concentrations. (A) Swarming behavior of wild-type HI4320 and fumC, frdA, and sdhB mutants on LB-1.5% agar containing 0.005% (wt/vol) sodium azide (NaN₃) following incubation at 37°C during aerobic conditions. Wild-type P. mirabilis HI4320 and the frdA TCA cycle mutant are resistant to NaN₃ and have similar swarming phenotypes. The addition of NaN₃ cripples swarming of the fumC mutant, while the sdhB mutant has a reduced swarming phenotype in the presence of NaN₃. (B) Glucose inhibits wild-type P. mirabilis swarming on NaN₃. P. mirabilis HI4320 was inoculated on LB-1.5% agar alone, agar with 0.02% (wt/vol) glucose, agar containing 0.005% (wt/vol) NaN₃, and agar containing 0.005% (wt/vol) NaN₃ and 0.02% (wt/vol) glucose. The vertical lines in panels A and B indicate the outer edge of the swarm.