UAS regulates expression of amino acids 216-487 (i.e the C-terminus (CT)) of Optix fused to GFP. This construct also includes a nuclear localization sequence.
Scer\GAL4GMR.PU-mediated expression of OptixCT.Scer\UAS.T:Avic\GFP,T:Zzzz\nls1 has no effect on eye development.