UASt regulatory sequences drive expression of a chimeric protein in which amino acid residues 70-322 of nrv2 (the entire extracellular domain) replace the corresponding portion of nrv3.
nrv2::nrv3Nrv2ABCD.UAS/Scer\GAL4da.G32 is a suppressor of presumptive embryonic/larval tracheal system phenotype of nrv223B