Activity of SOE against NNRTI mutant pseudovirus and a PI resistant strain. Serially diluted SOE was added to GHOST-CCR5 and GHOST-CXCR4 infected with NNRTI mutant pseudoviruses (K103N, Y188L and K103N/Y188L/G190A) and a PI resistant strain (PI-2840), respectively (A). Nevirapine (NVP) was included as control (B). All NNRTI mutant constructs were generated based on a molecular clone backbone, pNL4-3LucEnvVpr. The PI resistant strain (resistant to multiple anti-HIV protease drugs; 2840) carries L10R, M46I, L63P, V82T, and I84V. The luciferase level was measured 2 days PI. All results are means standard errors of the means from three independent experiments.