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Fig. 8. Genetic interactions in the eye. Scanning electron micrographs of (A) OreR (wild type, +), (B) GMR-RhoA/+, (C) GMR-RhoA/+; DMYPT03802/+, (D) GMR-Rac7A/+, (E) sqh[E20E21]/+;GMR-Rac7A/+, and (F) sqh[A20A21]/+;GMR-Rac7A/+. Heterozygosity for DMYPT03802 inhibits the formation of bristles in GMR-RhoA eyes, but has little effect on the overall eye size. In addition, the phospho-mimicking sqh mutation enhances, while the non-phosphorylatable sqh mutation suppresses, the rough eye phenotype associated with GMR-Rac.