Figure 1.
Schematic 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).
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