(g.c.)/cell. For the detection of GDNF or EGFP regulated expression, 293 cells were transduced with the AAV proviral plasmid pAAV2-rtTA2s-S2-TRE-d2EGFP or pAAV2-rtTA2s-S2-TRE-GDNF in the presence or absence of 1µM Dox-HCl (Sigma, St Louis, MO). Forty-eight hours after ...