The following information accompanied stocks donated to the Bloomington Drosophila Stock Center by Poonam Bhandari and Gerald W. Dorn, Washington University School of Medicine. P{UAS-GFP.ER-SR}18 is a homozygous viable insertion on the third chromosome. P{UAS-GFP.ER-SR}20 is a homozygous viable insertion on the second chromosome.