FIG. 4.

PPCs showing BASSOON and RIBEYE expression after 4 days of coculture. In rodent and human retinal explant coculture, confocal images of PPCs labeled with CellTrace™ Far Red, and BASSOON (BAS) and RIBEYE (RIB) localization are shown in green (arrows). When PPCs are incubated in standard tissue culture conditions, they do not express either BASSOON or RIBEYE. To stimulate synapse formation, cocultures were treated with thrombospondin-1 (TSP-1). Scale bar=10 μm. Color images available online at www.liebertpub.com/tea