X ORF protein Protein Vpx 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). Viral protein X 112 vpx VPX_HV2CA MTDPRETVPPGNSGEETIEEAFAWLDRTVEAINREAVNHLPRELIFQVWQRSWRYWHDEQGMSQSYTKYRYLCLMQKAVFIHFKRGCTCLGGGHGPGGWRPGPPPPPPPGLV