Figure 1 - full size

Figure 1. Figure 1. a: Stereo view of the omit map corresponding to the sugar molecule in subunit A of the monoclinic form. The map is contoured at 3.5 . Water molecules are indicated by crosses. Surrounding peptide stretches are also shown. b: Stereo view of the difference Fourier map contoured at 2.7 in the unoccupied binding site of subunit D.