Merck, P3303-1VL, Endoproteinase Asp-N from Pseudomonas fragi mutant strain

Endoproteinase Asp-N is a metallo endoprotease. It is obtained from a mutant strain of Pseudomonas fragi, which hydrolyzes peptide bonds on the N-terminal side of aspartic and cysteic acid residues. Asp-N is used in proteomics for peptide mapping and protein sequence work due to its highly specific cleavage of peptides.