Fig. 7. Developmental expression of caspase 14 and filaggrin in epidermis. In situ hybridization of sagittal sections from mouse backskin at the indicated ages using caspase 14-specific (left columns) or filaggrin-specific (right columns) cRNA probes. Shown is a comparison between wild type (+/+) and Hr^-/- (-/-). Arrowheads, specific signal. epi, epidermis; inf, infundibulum; u, utricle. Scale bar: 50 µm.