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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Tooth and scale morphogenesis in shark: an alternative process to the mammalian enamel knot system

Fig. 2

Gene expression patterns prior to tooth initiation in the catshark Scyliorhinus canicula. Expression is seen on whole mount lower jaws (a–g) and longitudinal sections (a1–g1) showing tissue specific expression in the odontogenic band (black arrow) except for Sc-Shh. A schematic of the whole section surface, with orientation, is given in a2. The square indicates the region magnified in a1-g1. Gene names are indicated of the left side of the panel. The basal membrane is located with a dotted red line. ap: apical, ba: basal, e: epithelium of the odontogenic band, lb: labial, lg: lingual, m: mesenchyme. Scale bars: (a–g) 200 μm, (a1-g1) 50 μm

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