X ORF protein vpx 111 MADPRKTVPPGNGGEVTIGEAFAWLERMVEAINREAVNHLPRELIFQVWQRSWRYWHDDLGMSQSYTKYRYLRLMQYAMFIHVKKGCTCLGGGHGPGGWRPGPPPPPPGLV Protein Vpx VPX_HV2KR Viral protein X Plays a role in nuclear translocation of the viral pre- integration complex (PIC), thus is required for the virus to infect non-dividing cells. May be necessary for virus replication (By similarity).