Diego Ingrosso, Audree V. Fowler, Janice Bleibaum, Steven Clarke -Corresponding author- Specificity of endoproteinase Asp-N (Pseudomonas fragi): Cleavage at glutamyl residues in two proteins Biochemical and Biophysical Research Communications Volume 162, Issue 3, 15 agosto 1989, Pagine 1528–1534 https://dx.doi.org/10.1016/0006-291X(89)90848-6