Fig. 3
From: Tooth and scale morphogenesis in shark: an alternative process to the mammalian enamel knot system
Gene expression patterns during early tooth development in the catshark Scyliorhinus canicula. Longitudinal sections showing tissue specific expression in tooth buds at stage EM (a, c, e, g, i, k, m, o) and LM (b, d, f, h, j, l, n, p). Gene names are indicated of the left side of each panel, the basal membrane is located with a dotted red line. ap: apical, ba: basal, ie: inner epithelium, lb: labial, lg: lingual, m: mesenchyme, oe: outer epithelium. Scale bars: 50 μm