Table 3.

Superoxide dismutase activity (log k_cat) of the Mn compounds studied

Class	Compound	log k_cat (M⁻¹ s⁻¹)	Reference
Mn porphyrins	MnM_x-2-PyP-Calbio	<6.5.^a	[60]
	MnTM-2-PyP	7.79	[12]
	MnTE-2-PyP	7.76	[12]
	MnTnHex-2-PyP	7.48	[12]
	MnTTEG-2-PyP	8.11	[13]
	MnBr₈TSPP	5.56	[11]
Mn salens	EUK-8	5.78	[20]
	EUK-134	5.78	[19]
	EUK-189	5.78	[19]
Mn cyclic polyamines	M40403	7.08,6.55	[48,67]
	M40404	Inactive	[48]
Control	Mn²⁺	6.1 – 7.7	[20]

This is not a single compound, but a mixture of several differently N-methylated Mn porphyrins that are present in a mixture in approximately same amounts(see text). Thus, the log k_cat is likely lower than 6.5 M⁻¹ s⁻¹ based on the data for tri- (log _kcat = 6.63) and di-methylated species (log _kcat = 6.52) [60].