Fig. 4From: Prolonged persistence of a novel replication-defective HIV-1 variant in plasma of a patient on suppressive therapyLimited levels of HIV-p24 production from all residual vDNA clones. TZM-bl cells were transfected separately with eight reconstructed vDNA clones in duplicate, and after 48 h, HIV-p24 levels in culture media were quantified by ELISA (Advanced Bioscience, Inc.). A standard HIV (JRCSF) DNA and our previously published residual vDNA clone (C1P) were used as positive controls for virus production in these assays. Error bars represent standard deviations (s.d.). Results were compared with the positive control C1P using unpaired t-test; asterisk (*) indicates p < 0.05Back to article page