Selective assay for endooligopeptidase a based on the cleavage of fluorogenic substrate structurally related to enkephalin - Juliano, L; Chagas, J R; Hirata, I Y; Carmona, E; Sucupira, M; Oliveira, E S; Oliveira, E B; Camargo, Antonio Carlos Martins de (Biochemical and Biophysical Research Communications, 1990)