FAQ: Has there been any comparisons of our Trypsin against Roche's enzyme, Promega’s and products #25300054 & 25200056 from Invitrogen?
As for Invitrogen’s Trypsin, it is intended for trypsinolysis of cells, while ours is for proteomic applications. You could use ours but it would be 100's of times more expensive because of its level of purity. At present we offer no substitution.