Enhancers of the HDAC4 rough eye phenotype. (Top) Stereomicrographs and scanning electron micrographs of the eye phenotypes resulting from GMR-GAL4 induced expression of the RNAi lines only. (Bottom) Phenotypes resulting from coexpression of the RNAi and HDAC4. The phenotype due to GMR-GAL4-induced expression of one copy of HDAC4 was enhanced by coexpression of the RNAi targeted to (A) CrebB, (B) MEF2, (C) Ankyrin, (D) Ankyrin 2, (E) Ubc9, and (F) Prosap.