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Fig. 5 Embryonic expression of the lamb2 and lamb2l genes. (A) Lateral view of lamb2 expression in the trunk and tail at 24 hpf. Strong expression is seen in the skeletal muscle. Expression is also seen in the notochord of the tail (arrowhead). (B) Lateral view of lamb2l expression in the trunk and tail at 24 hpf, showing staining in the neural tube (arrowheads) and pronephric duct (arrow). (C,D) Transverse sections of (C) lamb2- and (D) lamb2l-stained embryos, showing distinct expression domains. Neural tube (arrowhead) and pronephric duct (arrow) expression of lamb2l is indicated in D. (E) Dorsal view of head expression of lamb2 at 24 hpf. (F) In a transverse section through the head, at the position indicated by the line in E, lamb2 expression is visible in the cornea, lens and diencephalon. (G) Dorsal view of head expression of lamb2l at 24 hpf. Staining is prominent in the olfactory placode, telencephalon and midbrain. (H) Transverse section of the head of a lamb2l-stained embryo, at the position indicated by the line in G. Expression is seen around the diencephalic ventricle but not in the eye.