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Fig. 3 Fgf signalling is required for formation of pharyngeal and viscerocranial cartilages. (A–D) Ventral view of 4-dpf embryos stained to visualise cartilage following exposure to SU5402 for 24 h from the 12-somite stage (15 hpf). (A) Control embryo. (B–D) Embryos exposed to 10, 25, and 50 μM SU5402, respectively. A single, small cartilage element (arrow) is present in (B), and lenses are also present in that specimen (arrowhead) but these are absent from (C) and (D).
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Reprinted from Developmental Biology, 264(2), Walshe, J. and Mason, I., Fgf signalling is required for formation of cartilage in the head, 522-536, Copyright (2003) with permission from Elsevier. Full text @ Dev. Biol.