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Structure of rat QSOX with juxtaposed redox-active disulfides. The protein is oriented to correspond roughly to Figure 20. The flexible linker is behind the domains. Disulfides are shown with yellow sulfur atoms. The three CXXC motifs and the FAD cofactor are labeled. Unpaired cysteines are not shown. Disulfides not in CXXC motifs are displayed but not labeled. The rightmost CXXC motif is distant from the redox-active centers. PDB code is 4P2L.
