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. 2013 May 10;288(25):17968–17975. doi: 10.1074/jbc.M113.459024

FIGURE 4.

FIGURE 4.

Electron density map of the disulfide bonds. Shown are refined structure models and electron densities of Cys-245 and surrounding residues when the Cys side chains are absent. The 2FoFc composite omit map is contoured at 1.5σ, and the FoFc difference map (green) is contoured at 4.0σ. The clear electron densities of the dual conformation of Cys-245 (WT_neutral; A), the clear cross-link between Cys residues (WT_H2O2; B), and the clear separation of the densities (WT_DTT (C) and C245S (D)) are shown.