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The IscS-IscU complex. (A) The complex structure, as formed by the IscS dimer (orange) and two IscU protomers (pink) as obtained starting from the 3LVL coordinates. The catalytic loop of IscS is colored in blue and the PLP cofactor is displayed as spheres. (B) Zoomed view of the interface between IscS and IscU. Side chains of the main interacting residues are shown as sticks, while the rest of the protein is depicted as cartoons.
