Table 4. Gene expression levels achieved using the inducible, HSV IE bidirectional promoter.

	GFP and NGFR MFI for Clonal Cell Populations
Treatment	GFP	Fold-Increase	NGFR	Fold-Increase
No Dox	13 ± 4	——	801 ± 95	——
No Dox, Plus VP16	33 ± 14	2.6 ± 0.42	774 ± 30	1.0 ± 0.04
Plus Dox	119 ± 15	9.1 ± 0.13	883 ± 36	1.1 ± 0.04
Plus Dox, Plus VP16	1091 ± 96	83.9 ± 0.09	792 ± 40	1.0 ± 0.05

MFI, mean fluorescence intensity. Values are mean ± s.e.m., n = 3 experiments for two independent cell lines.