Fig. 1. Analysis of mice expressing Cre-recombinase under control of the Emx1 locus. Whole-mount tissue from E13.5 Emx1-Cre/LacZ mice was stained with X-gal (A). Whole-mount tissue from P0 Emx1-Cre/lacZ mice was stained with X-gal (B) and a frozen section from P0 Emx1-Cre/lacZ mice was stained with X-gal, and counterstained with Hematoxylin-Eosin (C,D). Section from P14 Emx1-Cre/lacZ mice was stained with X-gal (E). c, cortex; dp, dermal papilla; ds, dermal sheath; irs, inner root sheath; m, matrix; ors, outer root sheath. Scale bars: 500 µm in A-C; 50 µm in D; 20 µm in E.