Fig. 7. Stbm plays a role in Pk localization. (A) A schematic representation of a photoreceptor cluster in the third larval instar. (B-D) Wild-type disc and (E-G) stbm^6cn disc, immunostained for Pk (B,E) and Arm (C,F). (D,G) Overlays of B and C, and E and F, respectively. Arrow in B indicates high levels of Pk staining at the contact between R1/R7/R6 and R8. (E-G) Levels of Pk are significantly diminished overall, but not abolished in R3 and R4. Pk staining at the contact between R1/R7/R6 and R8 is not detectable (arrowhead in E). In all panels, anti-Pk is shown in green and anti-Arm is shown in red. Anterior to the right.