Cartoon of the AAV vectors used. CMV, CMV promoter and enhancer; nls eGFP, nucleus-targeted eGFP; dsRed, coding sequence for red fluorescent protein; short, total length of vector is 2.3 kb; long, total length of vector is equivalent to that of wild type (4.6 to 5.0 kb). ∗, eGFP or dsRed coding sequence plus stuffer sequences (see Materials and Methods).