. 2019 Apr 3;9(2):32. doi: 10.3390/life9020032

Table 6.

Metalloproteins involved in oxidative stress management in heterocysts.

Family	Enzyme/Complex	Protein(s)	Cofactor(s)	Metal ^†
Superoxide dismutases	Mn–SOD	SodA	Mn center	1 Mn
Superoxide dismutases	Fe–SOD	SodB	Non-heme Fe center	1 Fe
Non-heme peroxidases (ferritin-like superfamily)	Rubrerythrin	RbrA (Alr1174 ^§)	Non-heme Fe–Fe center	3 Fe
	Rubrerythrin	RbrA (Alr1174 ^§)	[Fe–4S] cluster	3 Fe
	Dps proteins	Dps1 (All0458 ^§)	Non-heme Fe–Fe center	2 Fe ^‡
		Dps2 (All4145 ^§)	Non-heme Fe–Fe center	2 Fe ^‡
		Dps3 (All1173 ^§)	Non-heme Fe–Fe center	2 Fe ^‡
		Dps4 (Alr3808 ^§)	Non-heme Fe–Fe center	2 Fe ^‡

^† Charge is not given for transition metals as it varies with the oxidation state during enzymatic catalysis. ^‡ Atoms of Fe per ferroxidase center. Dps protein complexes harbor 12 catalytic Fe–Fe centers [388]. ^§ Specific examples in the strain Anabaena sp. PCC 7120.