Figure 3 - full size

 

Figure 3.
Fig. 3. Interaction of DC with PI. a, stereoview of the bound inhibitor and the three catalytic residues is shown along with the 2F[o] F[c] electron density map at 2.0 Å resolution contoured at 1.0 . The H-bonds and their distances are indicated. b, four possible ionization states in the interaction of DC with the catalytic residues. Whereas the first binding mode results in three charged H-bonds, the rest of the binding modes result in one charged and two neutral H-bonds.

The above figure is reprinted by permission from the ASBMB: J Biol Chem (2000, 275, 41100-41106) copyright 2000.