Product Specification Alternative Name: Peptidylproline cis-trans-isomerase MW: 18kDa Formulation: Liquid. In 20 mM Tris-HCl, pH 7.8. Specific Activity: Catalyzes the cis-trans-isomeration of X-Pro-peptide bonds. The protein folding that is limited by the isomeration of X-Pro-peptide bonds can be accelerated by cyclophilin A. Also binds to cyclosporins and the cyclophilin A/cyclosporin A (Cat. #A-195) complex inhibits calcineurin (PP2B). Source/Host: Produced in E. coli. Long Term Storage: +4°C