TABLE 3.

Amounts of LPS in wild-type P. mirabilis (N2), the PpmrI knockout mutant (dIp), and the PPmrI-complemented strain (dIpc) in the absence and presence of PB

StrainLPS concn (mg/ml)a
PB (−)PB (+)
N213.2 ± 0.76.8 ± 0.6
dIp13.1 ± 1.112.9 ± 0.9
dIpc13.0 ± 0.87.0 ± 0.6
  • a LPS was quantitated as described in Materials and Methods in the absence [(−)] or presence [(+)] of 1 μg/ml polymyxin B.