"HIV-1 vpr reprograms CRL4(DCAF1) E3 to direct HLTF for proteasome-dependent degradation independent from previously reported Vpr interactions with base excision repair enzyme uracil DNA glycosylase (UNG2) and crossover junction endonuclease MUS81 which Vpr also directs for degradation via CRL4(DCAF1) E3."xsd:string