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Fig. 5 | EvoDevo

Fig. 5

From: Spatial and temporal patterns of gene expression during neurogenesis in the sea urchin Lytechinus variegatus

Fig. 5

Expression of survival and proliferation genes in the nervous system. al Lv-app is expressed in the anterior two-thirds of the embryo from 10 to 14 hpf (brackets in ac). At 24 hpf, Lv-app is expressed in the tip of the archenteron, and by 26 hpf, it is expressed in the coelomic pouches (arrowhead in i) and in the postoral neurons (inset images in il). mx Lv-trk is not expressed until 24 hpf when it turns on in the postoral neurons (arrowhead in t) and remains there through 32 hpf. a′l′ Lv-prohibitin is expressed in the mid- and hindgut (bracket in h′) beginning at 24 hpf through 32 hpf. m′x′ Lv-rasO is expressed in the ectoderm and vegetal plate at 10 hpf. By 14 hpf, Lv-rasO remains in the ectoderm and is in a band of expression surrounding the vegetal plate (arrows in o′, p′). By 20 hpf, Lv-rasO is expressed in one or both lateral sides of ciliary band (arrowhead in r′). By 22 hpf, Lv-rasO expression is on a single side of the lateral ciliary band. Expression then diminishes by 28 hpf. a″l″ Lv-hells is expressed in the ciliary band (arrowhead in h″) as well as the apical organ and hindgut. Scale bars = 50 μm

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