Activity of fractions of SOE against HIV-1ADA, HIVHXB2 and HIVVSV. Serially diluted PE (A), EtOAc (B), BuOH (C) or DW (D) fractions was added to GHOST-CCR5 and GHOST-CXCR4 infected with HIV-1ADA, HIVHXB2, and HIVVSV. The luciferase level was measured 2 days PI. All results are means standard errors of the means from three independent experiments.