Figure 1. Distribution of redox potentials for the most abundant cofactor types found in ProtReDox. Sorted according to mean redox potential cofactors and displayed vertically from most reducing to most oxidizing along with corresponding atomic structures. SF4 (4Fe4S; 82) -329 ± 268 mV; FES (2Fe2S; 64) -220 ± 199 mV; Flavin (114) -183 +/- 141 mV; Fe (10) -72 ± 173 mV; HEM (42) 43 ± 190 mV; Cu (147) 333 ± 129 mV. Count of each cofactor type is within parenthesis.