Figure 3 - full size

Figure 3.
Figure 3. Sequence of snapshots showing the deprotonation of the imidazole ring of the His12 N epsilon, Greek 2 atom: the difference (F[o]1/2E[o]1/2 - F[c]^1/2E[c]^1/2) maps are represented with a pH-scale colour code (from red/acid to blue/basic) and are contoured at 1.6 s.