TABLE 1.

Catalase- and peroxidase-specific activities of KatG

	WT KatG	KatG[S315G]
Catalase activity (IU/mg)	3800 ± 344	2039 ± 461
Peroxidase activity (IU/mg)	0.9 ± 0.1	0.6 ± 0.15
CmpdI formation (PAA) (m−1s−1)	3 × 104	7.4 × 104
CmpdI decay (PAA) (s)	∼80 s	∼40 s
INH affinity (optical) (μm)	1.0	0.7
INH affinity (ITC) (μm)	1.6	1.4
Decay of 5-c heme (aging) (weeks)	∼3	∼1