. "Removes 5-oxoproline from various penultimate amino acid residues except L-proline." . "Inhibited by thiol-blocking reagents." . "Belongs to peptidase family C15." . . . "Pyrrolidone-carboxylate peptidase" . "Pyroglutamyl-peptidase I" . "5-oxoprolyl-peptidase" . "Pyrrolidone carboxyl peptidase" . "Pyroglutamyl aminopeptidase" . "PYRase" . . "Release of an N-terminal pyroglutamyl group from a polypeptide, the second amino acid generally not being Pro." .