Figure 4 - full size

 

Figure 4.
Figure 4. Stereo view of the omit electron density map contoured at the 1.0s level showing the electron density for the anisic acid molecule in the bound triple mutant structure. In addition, the only water molecule hydrogen bonded to Nd1 of His48 is shown and it is 0.49 Å below the plane of the histidine ring.

The above figure is reprinted by permission from Elsevier: J Mol Biol (2003, 333, 367-376) copyright 2003.