Figure 3
Fo –Fc map and model of the Cys402—Cys521 disulfide bond for the fifth data set (E) of a series of nine data sets collected. Positive (4σ) and negative (−4σ) contours are shown in green and red, respectively. During structure refinement, the disulfide bonds were specified to exist and a van der Waals radius of 2.08 Å was used for the S atoms. |