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Fig. S4 Perturbation of pharyngeal arch outgrowth and chondrocyte condensation in barx1 morphants. (A, C and E) Control MO-injected embryos, (B, D and F) barx1 morphants (see Fig. 4). (A, B) Pharyngeal arch sagittal sections at 72 hpf (see Figs. 3I and J). Arrow indicates the extracellular matrix surrounding the stacked chondrocytes. (C–F) fli1:GFP transgenic line at (C, D) 32 hpf and (E, F) 48 hpf. ch, ceratohyal cartilage; M, Meckel's cartilage; m, mandibular arch; gill arches are numbered; h, hyoid arch; ov, otic vesicle. Anterior is to the left in all panels. Scale bars: (A–F) 100 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.