FIGURE 3.

Anti-HIV-1 activity of Viola tricolor peptide-enriched fractions. Extract #2 (V. tricolor) was fractionated and fractions dissolved in PBS. Then, fractions 1-5 and PBS control were titrated and added to TZM-bl cells. Cells were infected with HIV-1 (infection, blue) or medium was added (metabolic activity, grey). 2 days later, infection and metabolic activity was quantified via β-galactosidase or MTT-based assay, respectively. Data are normalized to untreated controls and represented as means ± SD of three independent experiments in triplicates.