Fig. 2. Mutation in crb suppresses interrhabdomere adhesion in prom and eys mutants.

(A–F) Electron micrographs showing tangential sections of ommatidia of Drosophila with the following genotypes in w background: cn bw prom¹ (A), cn bw prom¹; crb^11A22 (B), eys¹ cn bw (C), eys¹ cn bw; crb^11A22 (D), + cn bw prom¹/eys¹ cn bw +; +/+ (E) and + cn bw prom¹/eys¹ cn bw +; crb^11A22/+ (F). Numbers in A–F depict the numbers of individual rhabdomeres or rhabdomere clusters, not the identity of PRCs. Asterisk: IRS; white arrow: rhabdomere adhesion. Scale bar: 1 µm. (G,H) Quantification of interrhabdomeral adhesion of PRCs with different genotypes. Column chart (mean ± s.d.) represents the number of single rhabdomeres or rhabdomere clusters per ommatidium (G) and average individual rhabdomeres per ommatidium (H). n  =  number of ommatidia.