TABLE 2.
Catalase activities in M. loti katE and katG mutants and effects of exogenous H2O2 addition
| Strain | Catalase activity (U/mg protein)a
|
Ratiob | |
|---|---|---|---|
| −H2O2 | +H2O2 | ||
| MAFF303099 | 26.7 ± 2.0 | 45.8 ± 5.8 | 1.7 |
| ML2101D | 25.4 ± 0.6 | 42.2 ± 1.6 | 1.7 |
| ML6940DS | 0.0 | 0.0 | |
a
Decomposition of H2O2 by cell extracts was determined by the decrease in the A240. Cell extract preparation and addition of H2O2 were carried out as described in Materials and Methods. The activity values are the means of at least three experiments and are shown with standard deviations.
b
Activity ratio of H2O2-treated versus mock treated.