Anti-HIV-1 activity of n-butanol fraction of Acacia catechu . A) Anti-HIV-1NL4.3 activity of n-butanol soluble fraction at different concentrations in TZM-bl cells. B) Inhibition against HIV-1BaL infection using TZM-bl cells. Y-axis represents the luciferase expression in terms of relative luminescence unit (RLU) in HIV-1 infected and treated TZM-bl cells whereas X-axis represents different concentrations of the butanol fraction. Values are expressed as mean ± SE of 3 different experiments performed in duplicates. *p < 0.05; **p < 0.001 (as compared to infected control group without any treatment).