Fig. 3. Expression of CUC1 and CUC2 in pin1 embryos. CUC1 and CUC2 mRNA was detected using in situ hybridization. (A,B) Schematic representation of wild-type expression patterns of CUC1 (A) and CUC2 (B) in a median sagittal section. Relative intensities of the signal are represented by dark (strong) and light (weak) blue. (C,E) CUC1 expression in wild type (C) and pin1-3 (E) in serial longitudinal sections. (D,F) CUC2 expression in wild type (D) and pin1-3 (F) in serial longitudinal sections. Arrow in F indicates an example of a weak spot of signal, which is found at the side of the embryo in a few cases. Scale bar, 50 µm for C-F.