UASt regulatory sequences drive expression of Hsap\AVPR1A which is tagged at the C-terminal end with Tag:polyHis.
Expression of Hsap\AVPR1AScer\UAS.T:Zzzz\His6 under the control of Scer\GAL4GMR.PF results in flies with eyes that are significantly reduced in size and are disordered.
Expression of Hsap\AVPR1AScer\UAS.T:Zzzz\His6 under the control of Scer\GAL4ninaE.PT does result in a mutant eye phenotype.