Controlled and limited pepsin digestion, followed by selective salt precipitation. > 90% as judged by SDS-PAGE analysis. Applications: ? Type II collagen standard ? Antigen for antibody production ? Coating material for cell culture studies ? Formation of collagen gels Reconstitution: The collagen may be reconstituted by adding 500mM Acetic Acid. The collagen may be transferred into physiological buffers by dialysis at 2-8°C.