Fig. S3.
Electron density from initial phasing and anomalous difference Fourier maps of the Rep–Ant complex containing selenium in the asymmetric unit. (A) Initial phased map (1.5 σ) by the SAD method. (B) A composite simulated annealed omit map (1.5 σ) for Rep92–198 showing electron density around the MDD and CAD of Rep92–198. (C) Anomalous difference Fourier maps in the asymmetric unit illustrating the positions of selenium atoms from the WT Rep–Ant complex are shown in mesh. |(Fo-Fc)| difference density is contoured at 4σ. Each chain is shown in a different color, and magnified views of two representative regions are shown.