UAS sequences drive a cDNA that consists of the CRD and C-tail from fz and the transmembrane region of fz2. This has been tagged with Tag:MYC in the non-conserved region in between the CRD and the transmembrane domains.
When fz::fz21-2-2.Scer\UAS.T:Hsap\MYC is expressed by Scer\GAL4dpp.blk1, hardly any change in polarity is seen in wing hairs flanking the expression domain.