Figure 6From: Chikungunya virus adaptation to Aedes albopictus mosquitoes does not correlate with acquisition of cholesterol dependence or decreased pH threshold for fusion reactionEffect of NH 4 Cl on competition between LR-ApaI-226V and LR-226A viruses for growth in C6/36 (A) and BHK-21 cells (B). Thirty minutes prior to infection cells were pre-incubated with L-15 media containing various amounts of NH4Cl. Then cells were infected with 1:1 mixture of LR-ApaI-226V and LR-226A viruses (107pfu/mL) and incubated for 48 h in L-15 media containing various amounts of NH4Cl. Cell culture supernatants were harvested and used for RNA extraction or titration on Vero cells. Virus RNA was processed as discussed previously [15].Back to article page