Linearized Vpr, Tat, E1A, p300 and CtBP1 molecules and their mutual interaction domains. Vpr interacts with GR and several other NRs by its LxxLL motif Positioned at amino acids sixty four to 69. Binding internet sites of Vpr and p160-type HAT coactivators overlap with one another on p300. Considering that Vpr incorporates a LxxLL motif just like p