Fig. 3. PID mRNA expression in wild-type and pin1 embryos. (A-E) PID expression in wild-type embryos at the globular stage (A) and the early heart stage (B) in serial frontal longitudinal sections; the early heart stage in sagittal longitudinal section (C), and the torpedo stage in frontal (D) and sagittal (E) sections. (F,G) Serial longitudinal sections of pin1-3 embryo at the early heart stage (F) and the torpedo stage (G). (H) Schematic diagrams of PID expression in globular (left), heart (middle) and torpedo (right) stage embryos. Arrowheads in A indicate strong expression domains of PID mRNA. (C,E) Frontal view of each embryo with red line indicating the section plane. Scale bars: 50 µm in A-G.