a new type of dipeptidyl aminopeptidase , which releases basic aminoacyl dipeptides from the nh2-terminal end of oligopeptides , was purified about 2100-fold with 6.8 % recovery from rat brain membranes by column chromatography on cellex d , arg-tyr-ah-sepharose 4b , hydroxylapatite , and sephadex g-75 , after the membranes were solubilized with nonidet p-40 .
C0012512
dipeptides
C0028954
oligopeptides