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Figure 3. Protocadherin-15 is located at the calyceal processes of photoreceptor cells in X. tropicalis larvae. (A) In 4 dpf larvae, protocadherin-15 (green) is located around the base of the lectin-labeled (white) rod (R) and cone (C) outer segments (OS). Protocadherin-15 colocalizes with F-actin (red) that fill the calyceal processes (CPs). (B) In pre-embedding immunogold electron micrographs, silver-enhanced immunogold particles showed protocadherin-15 to be localized at the CPs surrounding the rod (top) and cone (bottom) OS. Sparse gold particles also decorate the lamellar membrane in cones (asterisks). (C) Protocadherin-15 immunolabeled gold particles (arrowheads) were localized with filaments connecting the CPs to the OS plasma membrane in rods (top) and cones (bottom). Bars: (A) 10 µm; (A, SEM image) 5 µm; (B) 200 nm; (C) 100 nm. |
