Figure 1.

Immunolabeling for the presence or absence of stem cells (SC) in human cornea. A: Section of limbal and peripheral cornea immunolabeled with a green fluorescent marker (Keratin 15) for corneal SCs. The cell nuclei have been stained with DAPI (4',6-diamidino-2-phenylindole; blue) and the basement membrane immunolabeled for laminin (red). B: Schematic diagram of the immunolabeled section with putative SCs labeled green, migrating right along the basement membrane to the transit-amplifying cell region and then upwards to surface to the terminally-differentiated cell region.