The two versions of the receptor were overexpressed in ECs by driving their expression with themex-GAL4driver (mex>PGRP-LEandmex>PGRP-LE14, respectively). Antibodies against mono/polyubiquitinated conjugates were used to stain midguts. DAPI labels DNA. A representative view with a focal plane near the basal surface of ECs is shown. See alsoFigures S2A and S2B. Scale bar: 10 m.
