Immunogen sequence: MDPVHIHRHS GLLSALGLAL ADVVHEAQEP CSLLYAPETF VQLDQRLSRL EEQCVDALQA QGFPRSQIST ESFLHLRYQG TDCALMVSAH QH Highest antigen sequence identity to the following orthologs: Mouse - 93%, Rat - 95%. OPLAH catalyzes the cleavage of 5-oxo-L-prolin