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Different interfaces of cysteine desulfurases and the sulfur acceptors. Protein interaction modes of CsdA-CsdE, IscS-IscU, and IscS-TusA are shown on one monomeric subunit of CsdA (and IscS) for clarity. The E. coli IscS-IscU and IscS-TusA are from PDB accession codes, 3LVL and 3LVK, respectively.
