Sequencing Grade Modified Trypsin, Frozen, Product Information
Instructions for Use of Product(s)
Literature # 9PIV5113
Trypsin specifically hydrolyzes peptide bonds at the carboxyl side of lysine and arginine residues. Unmodified trypsin is subject to auto-proteolysis, generating fragments that can interfere with protein sequencing of HPLC peptide analysis. In addition, auto-proteolysis can result in the generation of pseudotrypsin, which has been shown to exhibit chymotrypsin-like specificity. Promega Sequencing Grade Modified Trypsin is porcine trypsin modified by reductive methylation, rendering it resistant to proteolytic digestion. In enzymatic stability tests, modified trypsin was found to retain greater than two times the activity of unmodified trypsin.