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Dipeptidyl Peptidase IV
  In biochemistry, Dipeptidyl-Peptidase IV, aka DPP4 and adenosine deaminase, is a hydrolase enzyme reaction, that as a dipeptidyl serine protease, catalyses the release of a N-terminal dipeptide, encoded by the DPP4 gene.
  In biochemistry, Dipeptidyl-Peptidase IV has several biologically-active peptide substrates including chemokines, incretins (glucose-dependent insulin-releasing hormones), and neuropeptides.

DPP4 (Dipeptidyl Peptidase 4)
  In the body, DPP4 (Dipeptidyl Peptidase 4), may act as a systemic enzyme, known to influence T cells of the immune system, also helps digest casein and gluten. DPP IV is a protein DPP IV is a binding protein for purine, and adenosyl deaminase. *