. . . . . "HIV-1 Vpr forms a complex with HIV-1 nucleocapsid that directly activates PP2A" . "HIV-1 Vpr was found to upregulate PP2A in fission yeast" . "Amino-acid peptide sequence (residues 77-92) of HIV-1 Vpr binds to PP2A1. The sequence from HIV-1 89.6 strain is a cell penetrating and death domain" . "upregulates" . "binds" . "activates" .