At third instar, there are 'spots' ofexpression in the posterior compartment of the imaginal discs
Scer\GAL4e13C/elavUAS.cFa rescues elav5
cactUAS.cQa/Scer\GAL4e13C fails to rescue cact3/cact7
cactUAS.cQa/Scer\GAL4e13C fails to rescue cact3/cact5