The P{EP} insertion is within the 5' UTR.
viable (with EndoAEP3502)
Homozygous mutants die during the third instar larval stage. endoAEP593/endoAEP927 and endoAEP593/endoAEP464 transheterozygotes die as pupae. endoAEP3502/endoAEP593 transheterozygotes are viable.
The inability of endoAEP593 to rescue itself suggests a second site lethal in the EP593 line.