Rigidity and flexibility of dipeptidyl peptidase IV: crystal structures of and docking experiments with DPIV.
Engel M, Hoffmann T, Manhart S, Heiser U, Chambre S, Huber R, Demuth HU, Bode W, J Mol Biol, 2006 Jan 27 - link

Mutational studies on HslU and its docking mode with HslV.
Song HK, Hartmann C, Ramachandran R, Bochtler M, Behrendt R, Moroder L, Huber R, Proc Natl Acad Sci U S A, 2000 Dec 19 - link