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Structures of complex 16 (left) and complex 42 (right). Neutral residues of the hydrogenase are in cyan and those of the ferredoxin in lime green. The metalloclusters shown are the hydrogenase H-cluster and the ferredoxin [2Fe2S]F cluster. Positively charged residues on both proteins are shown in red, and negatively charged residues in blue. The pictures in Figs. 1–4 and 11, and in Table 2, were generated by VMD (32).
