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Figure Caption
Fig. SX.3
Zebrafish spp1 is expressed from 2 dpf specifically in cells surrounding the bone matrix.
Lateral and ventral views of 2 to 5 dpf embryos hybridized with spp1 RNA probe. There was no expression at 1 dpf. Endochondral bones (ch, ceratohyal; cb5, ceratobranchial 5) are highlighted in yellow whereas dermal bones (bsr, branchiostegal ray; cl, cleithrum; d, dentary; en, entopterygoid; mx, maxilla; op, operculum; ps, parasphenoid) are highlighted in white.
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