Bar J, Weber A, Hoffmann T, Stork J, Wermann M, Wagner L, Aust S, Gerhartz B, Demuth HU (2003)
Characterisation of human dipeptidyl peptidase IV expressed in Pichia pastoris. A structural and mechanistic comparison between the recombinant human and the purified porcine enzyme
Biol Chem 384: 1553

Engel M, Hoffmann T, Wagner L, Wermann M, Heiser U, Kiefersauer R, Huber R, Bode W, Demuth HU, Brandstetter H (2003)
The crystal structure of dipeptidyl peptidase IV (CD26) reveals its functional regulation and enzymatic mechanism
Proc Natl Acad Sci U S A 100: 5063