Crystal Structure of human dipeptidyl peptidase IV in complex with 1-(3,4-dimethowy-phenyl)-3-m-tolyl-piperidine-4-ylamine is available (2JID) and soon published byHennig et al..Crystal Structure of Aeropyrum pernix acylaminoacyl peptidase, H367A mutant is available (2QR5) and published by Kiss et al.. Two CES1 Gene Mutations(G143E, D260frameshift) Leading to Dysfunctional Carboxylesterase 1 Activity in Man are described by Zhu et al. AChE mutation in diazinon-resistant Haematobie irritans (horn fly) G262A is described and published by Temeyer et al..