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Do these results of enzymatic analyses on the certificate of analysis correlate with cell recovery?

by Jessica Helweg | Sep 16, 2019

No. Poorly defined, traditional collagenase products contain between 3-8 and 10-20% (w/w) collagenase. Collagenase is usually degraded during the fermentation or material processing procedure. Recent studies have indicated that proteolytic degradation of collagenase...

What does tryptic-like activity mean? How do you measure clostripain activity?

by Jessica Helweg | Sep 16, 2019

Clostripain is a neutral protease secreted by C. histolyticum during the fermentation process. It is a tryptic like enzyme that is measured using the same peptide substrate to measure trypsin activity (N-benzoyl-L-arginine ethyl ester, BAEE). Clostripain is a...

Do all the collagenase manufacturers use similar assays so I can assume the activities between suppliers are similar?

by Jessica Helweg | Sep 16, 2019

No. Although each manufacturer may use similar methods, they will use different lots of substrate from different suppliers, make additional modifications to the assay procedure, as well as other changes, it is safe to assume there is poor correlation when comparing...

What is the difference between the enzyme assays that are commonly included in a certificate of analysis?

by Jessica Helweg | Sep 16, 2019

Collagenase activity can be assessed by a number of different enzyme activity assays. The enzyme activity is defined by the substrate so  peptidase activity is detected when Pz-peptide (Wunsch assay) or FALGPA is used as substrates; gelatinase activity is detected...

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