DVMAT-B is not detected in photoreceptor cells and co-localizes with a marker for <i>Drosophila</i> glia.

<p>A primary antibody to the protein Tan (A) (green) labels the photoreceptor cell bodies and their axons that extend into the lamina (La) and medulla (Me), seen in horizontal cryostat sections of the head. Co-labeling with anti-B₂ (B) (magenta) shows no overlap with Tan in merged images (C). Glia were labeled using <i>repo-Gal4</i> to drive expression of the plasma membrane marker mCD8-GFP (D,G) (green). Some glial processes extend into the medulla (D,G) (small arrowheads). DVMAT-B was co-labeled using anti-B2 (E,H) (magenta). The merged images (F,I) show robust co-localization of DVMAT-B to profiles enclosed by glial cell membranes in the distal lamina, and additional, faint co-labeling of processes that extend distally into the retina (F,I) (large arrowheads). (G–I) Enlarged views of (D–F), to show the co-localization of the two signals. Bars: (A–F) 50 microns, (G–I) 10 microns.