Figure 1. Expression of P2X7 receptor on human conjunctival and corneal epithelial cells. Conjunctival cell line (A), corneal cell line (B) and cells from ocular surface impression cytology (C) presented P2X7 receptor expression. Cells were fixed, permeabilized, and then incubated with a P2X7 antibody. Nuclei were stained with propidium iodide. Cells were observed using the confocal microscopy.