FIG. 1.
Face on view of the 2Fo-Fc electron density map around the His-15 side chain. (a) 150 K, (b) 200 K, and (c) RT. The 2Fo-Fc electron density map is shown in purple at a contour level of 1.5σ. The steadily improving electron density for the His 15 imidazole at increasing temperature is clearly visible. Figure S1 of the supplementary material shows the edge on view.
