In some special applications in the field of regenerative medicine (e.g. isolation of islets, TILs and SVF), a purified, more highly active collagenase (Collagenase NB) is required. To meet these requirements, Nordmark Pharma developed a process in which, after fermentation of Clostridium histolyticum, further purification takes place over several chromatographic separation columns. This patented method reliably delivers highly purified Collagenase NB, in lyophilized form in vials with defined activity. The isolation of defined, intact cells from complex tissues is a major challenge, and the demands made on the purity of the collagenase used are correspondingly high.