Gibco® Trypsin-EDTA is made from trypsin powder, an irradiated mixture of proteases derived from porcine pancreas. Due to its digestive strength, trypsin solution is widely used for cell dissociation, routine cell culture passaging, and primary tissue dissociation. Concentrated forms of trypsin can be aseptically diluted to 1X using a balanced salt solution without calcium and magnesium. The trypsin concentration required for dissociation varies with cell type and experimental requirements.