A number of ELISA Kits are available that target dipeptidylpeptidase 4, an alias of the protein, dipeptidyl peptidase 4. The human protein, encoded by the gene DPP4, is an enzyme and member of the Peptidase S9B family, DPPIV subfamily. The protein's cellular localization is indicated to be membrane-associated and secreted. Additional synonyms or past names for this protein may include: ADABP, ADCP2, CD26, DPPIV, TP103. Homology is conserved in other species, such as Mouse, Rat.