What do the different Typings indicated for Sigma enzymes mean?
Many enzyme products offered by Sigma will include a ‘Type’ in the description (e.g. collagenase type I). These typings are generally ‘internal’ Sigma typings indicating a different source or method of manufacture for a product and may have no biological significance. Care should be taken not to confuse ‘Sigma typings’ with recognised classifications from the literature (e.g. Bornstein and Traub typings for collagen).
