Figure 2 of Di Lauro, Mol Vis 2016; 22:243-253.

Figure 2. Schematic view of the coculture model of the porcine neuroretina explant and isolated RPE cells. The neuroretina explant was placed over a cell culture membrane, and the RPE cells were placed on the bottom of the cell culture insert and cocultured together in the same well. In this configuration, the cell culture membrane physically separated them, but signal molecules could pass through the porous membrane. This figure is not to scale.