Figure 13.
Distance map for the catalytic site of CfNH with contacts to the catalytic site and pAPIR as a catalytic site ligand. His82 is 3.6 Å from the leaving group and has been considered a potential leaving group proton donor. Note the 2.7 Å neighboring group interaction between O5′ and O4′. Reproduced from ref 96. Copyright 1996 American Chemical Society.