fwe+8.2.RA.YFP.RB.GFP.RC.mRFP(Unk) generates differentially tagged isoforms of fwe, allowing isoform-specific expression pattern analysis. GFP-tagged fwe-PC (fweLose-A) is expressed in all retinal neurons from 24-46 hours APF. RFP-tagged fwe-PB (fweLoseB) is not expressed until 36 hours APF, in ommatidia at the periphery of the retina, where photoreceptor neurons are undergoing programmed cell death; this expression is maintained until 44 hours APF.