Figure 1From: Vpu-dependent block to incorporation of GaLV Env into lentiviral vectorsSchematic representation of retroviral (pCgp) and lentiviral (R8.2, R8.2ΔVpu, R8.91 and R8.91Vpu) packaging constructs. All lentiviral vectors express Gag, Pol, Tat and Rev; inclusion of Vif, Nef, Vpu and Vpr is as indicated (grey boxes).Back to article page