(A) Schematic depiction of Ndg full length (FL) and different Ndg deletions tested in this study. All Ndg versions are tagged with GFP in the C-terminal. SP = Signal Peptide. G1/2/3 = Globular domains 1/2/3. (B) Confocal images of wing discs from larvae expressing the indicated versions of Ndg under control of Cg-GAL4. Correct BM localization, detected by GFP signal (green, arrows), is observed only for Ndg versions containing the Rod domain (NdgFL, NdgRodG3, NdgΔG3, NdgΔG2, NdgΔG1 and NdgG2Rod) but neither NdgRod nor any other single domain can localize to the BM by itself. Nuclei stained with DAPI (blue). (C) Model of domain requirements for proper Ndg localization to BMs.