Figure 6. Localization of Mel1a and Mel1b in progressive confocal optical slices of Xenopus corneal epithelium. A: Image of the most superficial surface of the surface corneal epithelium. Note the predominance of yellow (merged red and green) labeling of most lateral membranes, with a lesser amount of interdigitated red Mel1a labeling (note arrowheads indicating an example of this). B-F: As the 0.4-µm slices progress deeper into the corneal epithelium layer , there is not a transition from red to green labeling as was seen with Mel1a-Mel1c, but instead the predominance of yellow labeling with some interspersed red labeling is maintained throughout all slices. Nuclei are stained with DAPI. The magnification bar (F) represents 20 µm.