Tissue Dissociation Enzymes for Isolating Human Islets for Transplantation: Factors to Consider in Setting Enzyme Acceptance Criteria by Jessica Helweg | Jan 10, 2017 McCarthy RC, Breite AG, Green ML, Dwulet FE. Tissue dissociation enzymes for isolating human islets for transplantation: factors to consider in setting enzyme acceptance criteria. Transplantation. 2011;91(2):137-45.