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. 2014 Dec 2;111(50):17917–17922. doi: 10.1073/pnas.1409913111

Fig. 4.

Fig. 4.

Modulation of Tbx5 expression accompanies forelimb and sternum adaptation in the emu. (A–I) In situ hybridization showing Tbx5 expression in the forelimb-forming region (bracket), forelimb (FL), and heart (*) of chick (A–D) and emu (F–I) embryos. (K–N) In situ hybridization showing Pitx1 expression in the emu hindlimb forming region (bracket) and hindlimb (HL). (E and J) Lateral view of Alcian Blue/Alizarin Red-stained chick and emu skeletons at days 10 and 27, respectively, highlighting forelimbs (yellow) and sterna (orange). (A–M) Lateral views. (N and Inset) Dorsal views.