Figure 3
Patterson maps. These are xy Harker sections showing the asymmetric unit. Bijvoet difference Patterson maps at (a) z = 0.5 and (b) z = 0.25 are shown for the native data. Isomorphous difference Patterson maps at z = 0.5 are shown for (c) the NaI and (d) the CsCl quick-soak derivatives, respectively. Maps are contoured starting at 3σ in 0.5σ steps. Predicted Patterson peaks are labelled with a cross; observed peaks are labelled with the atom name. The iron anomalous and caesium isomorphous difference maps are at 2.6 Å resolution, while the iodide isomorphous derivative map is limited to 2.8 Å resolution. The origin peak at (1/2, 1/2, 1/2) has been removed. |