Cyclophilins catalyze the isomerization of peptide bonds from trans form to cis form at proline residues and facilitate protein folding. Cyclophilin A is one of the cellular proteins that gets incorporated into budding HIV particles and may be important for HIV assembly and infectivity.

Now available from ProteinOne, recombinant 6xHis tagged Cyclophilin A expressed and purified from Escherichia coli.