Fig. 4. The Dmkp3 wing phenotype is sensitive to RAS pathway activity. (A) Dmkp3 mutant wings exhibit additional vein material at four different sites marked by arrowheads. This phenotype is strongly enhanced by Ellipse (compare C to D) and it is very reminiscent of UAS-rl^Sem (B). Relative numbers exhibiting extra veins at each of the four sites are given in E. rl^10A dominantly suppresses and PTP-ER dominantly enhances the phenotype. Between 100 and 235 wings were counted.