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Fig. 4. Expression patterns of developmental landmark genes in wild-type (wt, upper
panels) and ntn mutant (lower panels) embryos at 30 hpf. Lateral
views of embryos stained by in situ hybridization with (A) antisense
zash1a probe; (B) antisense zash1b probe; (C, left)
antisense hlx1 probe; (D) antisense dlx2 probe; (E)
antisense krox20 probe; (F) antisense shh probe; (G)
antisense pax2a probe; (H) antisense ntl probe. (I)
antisense myod probe. (C, right) Dorsal view of embryo stained by in
situ hybridization with antisense hlx1 probe. Arrowheads in D
indicate pharyngeal arches; arrowheads in G indicate pronephric ducts. Scale
bars: 100 µm in A-D,F; 50 µm in E,G-I.