Axonal projections of En-expressing neurons.

<p><b>A</b>. mCD8::GFP expression driven by <i>JO1-GAL4</i> and <i>en-GAL4</i> (green). Background neuropil is stained with nc82 antibody (purple). Vertical columns show representative slices in an anterior – posterior series of confocal slices taken through the brain, in the area of the AMMC and antennal lobe. The numbers indicate the approximate position of the section in microns. <b>B</b>. False-colored versions of the GFP images, tinted to show the anatomically defined groups of JO axonal projections as defined by Kamikouchi. Engrailed is expressed in the A group, mostly in the AA subset, in a few B axons, and in some E group axons. Scale bar: 20 µm.