GFP and β-galactosidase
expression in mice derived from lines G3, 7, 8 and 9. Immunoblot
analysis of GFP, β-galactosidase and β-actin in whole brain extracts of mice
derived from G3, 7, 8 and 9 compared to wild-type mice (wt). Proteins
were resolved on SDS–polyacrylamide gels, transferred onto
a nitrocellulose membrane and probed with antibodies that recognize
GFP, β-galactosidase and β-actin.
Antibodies were visualized by chemoluminence method. (B)
Stereomicroscopic visualization of β-galactosidase
(left) and GFP (right) expression in alternate coronal brain sections
of the mice derived from G3, 7, 8 and 9 at P15. The β-galactosidase
staining is co-localized with GFP fluorescence in all four lines.
It is restricted to the cortex (Cx, layer 2,3 and 5), hippocampus
(Hi), striatum (S) and amygdala (A). Line G8 shows moderate expression
and GFP fluorescence in the overview is comparable to autofluorescence
of brain sections of a wild-type mouse.