Fig. 3.

Representative confocal images of Oct4-positive cells based on GFP fluorescence in Oct4-GFP transgenic mouse lungs. This image shows that Oct4 is confined to the adventitial cells of a blood vessel. The cells also present long extensions which tend to establish intercellular contacts. Shown in red is α-SMA labelling of the vascular smooth muscle cells. Bar = 10 μm.