Next, to examine whether full viral replication is
attenuated in highly HIV-1-susceptible T cells following
dual transduction with HIV-1-specific gRNA and Cas9
lentiviral vectors, we challenged dually transduced MT-4
cells with replication-competentWTHIV-1NL4-3 or HIV-
1NL4-3 mut at a low MOI and subsequently measured p24
antigen in the cells and culture supernatants.