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Dipeptidyl peptidases 8 and 9: specificity and molecular characterization compared with dipeptidyl peptidase IV
Biochemical Journal 396: 391

Bjelke JR, Christensen J, Branner S, Wagtmann N, Olsen C, Kanstrup AB, Rasmussen HB (2004)
Tyrosine 547 constitutes an essential part of the catalytic mechanism of dipeptidyl peptidase IV
Journal of Biological Chemistry 279: 34691

Rasmussen HB, Branner S, Wiberg FC, Wagtmann N (2003)
Crystal structure of human dipeptidyl peptidase IV/CD26 in complex with a substrate analog
Nat Struct Biol 10: 19