TABLE 3.

Remaining hydrogen peroxide

H2O2 (mM)Mean hydrogen peroxide remaining (% of initial amt) ± SD in straina:
SL1344 wtSL1344 katG katE mutantSL1344 hemA26 mutantb
0.51.3 ± 0.955.3 ± 2.734.0 ± 2.8
1.09.6 ± 3.976.8 ± 8.052.3 ± 8.4
  • a Hydrogen peroxide was measured 10 min after exposure to either 0.5 or 1 mM H2O2. wt, wild type

  • b hemA26 cells were introduced with the prfA plasmid (pTE367) to adjust the total number of CFU of the hemA26 strain.