Gibco® Collagenase Type IV is isolated from Clostridium histolyticum and packaged as a lyophilized, non-sterile powder for research use in cell or tissue dissociation and organ perfusions. Gibco® Collagenase Type IV activity is guaranteed to be greater than 160 units/mg. Compared to other collagenase preparations, Gibco® Collagenase Type IV has low tryptic activity and is well-suited for the digestion of islet cells from the pancreas.