Zander K, Sherman MP, Tessmer U, Bruns K, Wray V, Prechtel AT, Schubert E, Henklein P, Luban J, Neidleman J, Greene WC, Schubert U. Cyclophilin A interacts with HIV-1 Vpr and is required for its functional expression. J Biol Chem. 2003 Oct 31; 278(44):43202-13.