Imprecise excision of the P{SUPor-P} element in P{SUPor-P}KG02299 has resulted in deletion of the first two exons of egr. Part of the insertion still remains.
The wing discs of egre2 mutant third instar larvae exhibit similar levels of apoptosis to controls in response to X-ray induced irradiation. As in controls, very little apoptosis is seen in the absence of irradiation.