Fig. 6.

X-Gal staining as a reporter for Cre recombinase activity. The Math1-Cre and L7-Cre transgenes were bred onto the Cre reporter line, Rosa26, which expresses β-galactosidase in the presence of Cre recombinase. X-Gal staining, in blue, was located in PCs in L7-Cre expressing mice (A), and in GCs in Math1-Cre expressing mice exposed to tamoxifen at E16.5 (B), but not control mice that did not carry a Cre transgene (C). (Scale bar = 200 µm)