Involved in the negative regulation of the Egfr/Ras signaling pathway (PubMed:34411095). During wing morphogenesis, may function redundantly with PVRAP to inhibit Egfr activity and prevent uncontrolled cell growth (PubMed:34411095). May interact (via SH2 domain) with Egfr (when phosphorylated). Detected along the wing margin, with high levels of expression in two stripes of cells on either side of the dorsal/ventral boundary and lower levels of expression in a small region at the anteroposterior boundary (at protein level) (PubMed:34411095). High levels of expression along two parallel stripes of cells on either side of the wing pouch dorsal/ventral boundary, and slightly lower levels of expression in a region either side of the anteroposterior boundary (PubMed:34411095). Also expressed in discrete regions of the wing imaginal disk outside of the pouch (PubMed:34411095). Expressed in eye imaginal disk photoreceptors with highest levels of expression in R7 photoreceptor cells (PubMed:34411095). RNAi-mediated knockdown in adults does not result in a visible phenotype (PubMed:34411095). However, simultaneous knockdown of EGFRAP (CG33993) and PVRAP results in the development of ectopic sensory organs in the notum and blisters in the wings (PubMed:34411095). RNAi-mediated knockdown in the posterior compartment of the wing disks, increases expression of PEK (PubMed:34411095).