Figure 3 - full size

 

Figure 3.
Fig. 3. A, low energy hydrogen bonding network for Trp79, Thr90, a bound water, and the peptide Gln. B, alternate, higher energy, hydrogen bonding scheme for these groups.

The above figure is reprinted by permission from the ASBMB: J Biol Chem (1997, 272, 13220-13228) copyright 1997.