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. Author manuscript; available in PMC: 2013 Sep 11.
Published in final edited form as: Dev Cell. 2012 Sep 11;23(3):482–493. doi: 10.1016/j.devcel.2012.07.009

Figure 2. Radial development of the PA wall.

Figure 2

Longitudinal sections through the left PA wall at the embryonic ages indicated, stained for SMA (red), PDGFR-β (green), and nuclei (DAPI, blue) as indicated. Arrowheads, nuclei elongated longitudinally. The inset in E shows a transverse section through the left PA wall. Schematics at bottom summarize SMA (red) and PDGFR-β (green) expression (orange, co-expression of SMA and PDGFR-β) and cell shape and orientation changes in the forming layers (E, 1, 2, A) of the developing PA wall. Lu, PA lumen. Square cells, circumferentially-oriented cells. Scale bars, 10 μm. (See also Fig. S2.)