properties of matter : Freeze-dried powder. From Clostridium histolyticum. A component of the NCIS kit. This material is 0.22 micron membrane filtered and lyophilized in autoclaved vials. A vial reconstituted with 5 ml of HBSS or equivalent yields a solution of 300 units/ml of collagenase, Code:CLSPA. Suitable for cell isolation and culture applications . Each component can be ordered separately as belowl.