Figure 1.
rAAV9 stability testing. (a) Infectious titer assay: iodixanol-purified rAAV9-GFP was exposed to sodium citrate/phosphate buffers in the range of pH2.55–8.05, at room temperature for the time period of 2 hours, 24 hours, or 3 weeks. After incubation, an aliquot was diluted in Lactate Ringer solution and used to infect C12 cells coinfected with Ad5 (multiplicity of infection of 5). GFP (+) cells were visually scored at 48 hours after infection. (b) EM studies: viral capsid were visualized after treatment at different temperatures (rows) in buffers of different pHs (columns).