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. 2008 Jan 30;3(1):e1514. doi: 10.1371/journal.pone.0001514

Figure 5. AprB protein matrix surrounding the [4Fe-4S] cluster I and II (residues in a distance of less than 5.0 Å are shown) in the three-dimensional structure from A. fulgidus (A) and selected, homology modeling-based models from Allochromatium vinosum (B), Pelagibacter ubique (C), Pyrobaculum calidifontis (D), Desulfotomaculum reducens (E), Desulfovibrio vulgaris (F), Chlorobaculum tepidum (G), and Thiobacillus denitrificans (H).

Figure 5

Charged and polar residues are marked (positively charged AA, blue; negatively charged AA, red; polar AA, yellow); tryptophan (Trp-B48/-B43) and cysteine residues are highlighted by violet and green color.