Recently Cyclophilin A (CypA) was found to act as a cofactor in MVV showing high affinity for three proline residues at P21, P24 and P192 on MVV Vif.
Komið hefur í ljós að Cyclophilin A (CypA) tengist Vif próteini MVV á tveimur stöðum um amínósýrurnar P21/P24 og P192.