Illustration of pig aconitase in complex with the [Fe4S4] cluster, PDB ID 7ACN. The protein is colored by secondary structure, and iron atoms are blue and the sulfur red.
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![Illustration of pig aconitase in complex with the [Fe4S4] cluster, PDB ID 7ACN. The protein is colored by secondary structure, and iron atoms are blue and the sulfur red.](image_science_archive_68/040301_68/275550_7ACN_68.jpg)