Double immunolabeling for β-galactosidase (green) and GFAP (red) displays no astrocyte specific expression of β-galactosidase in either GFAP-Cre (E) or CaMKII-Cre (F) animals. Scale bar = 50 μm. GFAP, glial fibrillary acidic protein; CaMKII, calcium-calmodulin-dependent protein kinase II; NeuN, neuron-specific nuclear protein.