The function of DPP3 (dipeptidyl peptidase 3, ENSG00000254986) is as follows. Cleaves and degrades bioactive peptides, including angiotensin, Leu-enkephalin and Met-enkephalin (PubMed:1515063, PubMed:3233187). Also cleaves Arg-Arg-beta-naphthylamide (in vitro) (PubMed:11209758, PubMed:3233187, PubMed:9425109). {ECO:0000269|PubMed:11209758, ECO:0000269|PubMed:1515063, ECO:0000269|PubMed:3233187, ECO:0000269|PubMed:9425109}.