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Fig. 5 | EvoDevo

Fig. 5

From: Outflow tract septation and the aortic arch system in reptiles: lessons for understanding the mammalian heart

Fig. 5

OFT development in the turtle Pelodiscus HH22–27. a TFAP2α+ cells (brown) in the pharyngeal mesoderm and the endocardiac jelly (arrow). Positive cells are only found over a short distance (<50 μm) into the heart. Bar = 100 µm. b In the same embryo, the periphery of the pharyngeal arch arteries also shows positive brown-stained cells (arrows). c HH27 TFAP2α in the wall of the truncus caroticus (PAA3, long arrow). There is no TFAP2a positivity in the OFT cushions beyond the border with PAA3 (arrowheads). TFAP2α-positive cells in the basis of the individual PAA3, but not in the sAo, the vAo or the PAA6. d, e Amira reconstruction of the ventricular lumen (red), OFT cushions (blue), NCC condensed mesenchyme (green*) and PAAs, indicated by colour and number (3, 4, 6). e Seen from cranial. OFT cu outflow tract cushions, ventr ventricular lumen, D dorsal, V ventral

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