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A) Schematic representation of RrCODH dimer indicating the C‐cluster (NiFe4S4 cluster, active site), B‐clusters (intramolecular Fe4S4 clusters), D‐cluster (intermolecular Fe4S4 cluster) and N‐terminal positions. B) Simplified mechanism for the reversible CO2 reduction at the C‐cluster involving Cred1 and Cred2 states.
