A sev enhancer and Hsp70 promoter drive expression of a chimeric protein consisting of the first 455 amino acids of tor13D fused to full length ksr.
visible
eye
ommatidium
photoreceptor cell R7
Flies carrying ksr::torfl.hs.sev have a rough eye phenotype, and lack R7 photoreceptor cells in 50% of the ommatidia.