Fig. 6. Glass Bottom Boat (GBB) levels are increased throughout the muscle, and at the postsynapse (arrow), of syncrip mutants.

(A–C″) Anti-GBB immunofluorescence in syncrip mutants is dramatically elevated throughout the muscle and at the postsynapse relative to wildtype controls, indicating that Syncrip regulates BMP retrograde signalling through GBB. Images are maximum intensity 5 µm projections (quantitative analysis performed on full z-stack). Scale bars: (A–B″) 40 µm, (C–C″) 5 µm.