. "This cell-surface-associated serine exopeptidase is found in the Gram-negative, anaerobic bacterium Porphyromonas gingivalis, which has been implicated in adult periodontal disease." . "The enzyme releases tripeptides from the free amino terminus of peptides and small proteins, such as interleukin-6." . "The enzyme possesses an absolute requirement for a proline residue at the P1 position but is completely inactivated by a proline residue at the P1' position." . "The size of the peptide does not affect the rate of reaction." . . . "TPP" . "Prolyl tripeptidyl peptidase" . "Xaa-Xaa-Pro tripeptidyl-peptidase" . "Prolyltripeptidyl amino peptidase" . "Prolyltripeptidyl aminopeptidase" . "PTP-A" . "Hydrolysis of Xaa-Xaa-Pro-|-Yaa- releasing the N-terminal tripeptide of a peptide with Pro as the third residue (position P1) and where Yaa is not proline." .