Fig. 4From: Functional bottlenecks for generation of HIV-1 intersubtype Env recombinantsInfluence of discordance in tat/rev exon 1 and 2 on HIV-1 intersubtype envA/D recombinant envelopes. The tat exon 1 sequence from isolate D109 was cloned into the non-functional plasmids containing entire envs from HIV-1 A91, A115 and D109 parental virus (a and d), env recombinants from A91/D109 pair (b and e) and from A115/D109 set (c and f) which were subjected to Veritrop assay and virus replicationBack to article page