Figure 2.
Stereo image of the 2Fo-Fc electron density contoured at 1.0σ after phase extension and refinement to 1.1 Å. Amino acids Phe24 (top left), Trp69 (top right) and Trp28 (bottom left) are shown in gold. The stereo image was created with the molecular graphics program Pymol [http://pymol.sourceforge.net/].