α-CaMKII-promoter
controlled GFP expression in the mouse. (A) Schematic
drawing of transgenes for regulated GFP and β-galactosidase
expression . The upper line shows the tTA activator transgene from
line TgCaMK2tTA and the lower line describes the tTA-responsive
minigenes used to produce lines G3, 7, 8 and 9 (TgGFPtetO7lacZ).
CMVm shows the position of transcriptional start sites after tTA
has bound to the TetO7. Dashed lines, intronic sequences;
arrows, transcriptional starts, black boxes, transcriptional stops;
open arrows, open reading frames. (B) Stereomicroscopic
identification of GFP expressing TgCaMK2tTA/GFPtetO7lacZ mice compared
to non-activated TgGFPtetO7lacZ living pups of line G9
at P0 and P5. The overview shows GFP fluorescence in regions of
the olfactory epithelium, the olfactory bulb and the cortex. At
P5, exposure time was increased 4-fold to monitor GFP fluorescence.