>1Z8X_1|Chains A, B, C, D|Pyrrolidone-carboxylate peptidase|Pyrococcus furiosus (2261) MKVLVTGFEPFGGEKINPTERIAKDLDGIKIGDAQVFGRVLPVVFGKAKEVLEKTLEEIKPDIAIHVGLAPGRSAISIERIAVNAIDARIPDNEGKKIEDEPIVPGAPTAYFSTLPIKKIMKKLHERGIPAYISNSAGLYLSNYVMYLSLHHSATKGYPKMSGFIHVPYIPEQIIDKIGKGQVPPSMSYEMVLEAVKVAIEVALEELL