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Fig. 6 Loss of barx1 enhances chordin and gdf5 expression in the jaw joint. Whole-mount in situ hybridization for (A, B) bapx1, (C, D) chordin (chd), and (E, F) gdf5. (A, C, E) Control uninjected embryos; (B, D, F) barx1 morphants (see Fig. 4). Embryonic ages as indicated. (A, B) Lateral view, anterior to the left. (C–F) Ventral view, anterior at the top; asterisk indicates Meckel's cartilage, open arrowheads indicate jaw joint expression domains; e, eye; ch, ceratohyal; o orifice. Scale bar: (A–F) 50 μm.
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Reprinted from Developmental Biology, 321(1), Sperber, S.M., and Dawid, I.B., barx1 is necessary for ectomesenchyme proliferation and osteochondroprogenitor condensation in the zebrafish pharyngeal arches, 101-110, Copyright (2008) with permission from Elsevier. Full text @ Dev. Biol.