Fig. 9. Expression of Bb1C and Bb2C in the knife-shaped larva. (A-D) A stage L1 larva (24 hour) was simultaneously stained for Bb.ß-catenin (A), Bb1C (B,D in green), Bb2C (C,D in red) and DNA (D in blue). Arrowheads indicate the NoD, NoM and NoV cell layers of the notochord (No). Asterisks and thin white arrows indicate the lumen of the intestine (In) and the apical surfaces of the intestinal epithelial cells, respectively. Large white arrows point to the posterior end of the notochord. Green arrows in B point to lines of Bb1C concentration in the nerve cord (Nc). (E) Schematic representation of the area boxed in A. (F-H) High magnifications of B-D corresponding to the area boxed in A. In F, the arrows point to high concentrations of Bb1C at the interfaces between NoV cells. In G, the arrows point to high concentrations of Bb2C at the interfaces between NoD cells, while the arrowhead indicates the weaker concentrations of Bb2C between a NoD cell and NoM cells. Scale bars: 20 µm.