Figure 1 - full size

 

Figure 1.
Figure 1. Schematic diagram of the PALA binding site in the C1 chain of aspartate transcarbamoylase. Shown are all of the residues that have hydrogen bonding interactions (dashed lines) with PALA. The only substantial difference between the C1 and C6 active sites is a reorientation of the side chain of Arg54.

The above figure is reprinted by permission from John Wiley & Sons, Inc.: Proteins (1999, 37, 729-742) copyright 1999.