Human dipeptidyl peptidase IV gene promoter: tissue-spe- cific regulation from a TATA-less GC-rich sequence characteristic of a housekeeping gene promoter. Biochem J. 1995;311(Pt 3): 835-43. N-Terminal ab-hydrolase domain Figure 2. b-propeller domain of porcine DPP-IV (PDB: 1orv). A)...