AAV8 yields best kidney transduction determined by in vivo luminescence. Mice were given SC injections of 2e11 GC of AAV2-Cre, AAV6.2-Cre, AAV8-Cre, or AAVrh10-Cre (n = 1 for each serotype). Luminescent signals were measured at days 10, 20, and 30, and the signals typically declined from day 10 to 30. Luminescence is quantified in Average Radiance, p/sec/cm2/sr (Avg Rad).