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Fig 6. Dsel is expressed maternally and in the eye, brain and cranial neural crest.
Embryos after whole-mount in situ hybridization are shown in animal view (A), lateral view (B,E,E’,I,I’), hemi-sectioned (C) and transversally sectioned (F-H). (A) 4-cell stage embryo. (B,C) Blastula embryos. The bold line indicates the level of section in C. (D) qPCR analysis at stage 9. Note ubiquitous expression of Dsel in the animal cap, marginal zone and vegetal region. (E-I’) Tailbud embryos. The bold lines indicate the level of sections in F-H. Note Dsel expression in the eye, interneurons of the mid- and hindbrain (arrows), cranial neural crest (indented arrowheads) and bilateral trigeminal ganglia. an, animal cap; ey, eye; hb, hindbrain; ma, marginal zone; mb, midbrain; V, trigeminal ganglion, vg, vegetal region. Scale bars are 500 μm. |
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Fig 9. Comparison of Dse and Dsel expression in the head.
Embryos at stage 32 are shown in lateral views (A,E) and transversal sections (B-D’, F-H’). (A) Dse expression. The bold lines indicate the level of sections in B-D. (B-D’) Dse expression is found in the cranial neural crest (indented arrowheads). Note ventral expression domains in the forebrain, posterior midbrain, hindbrain, and notochord. Weak expression is visible in the trigeminal ganglia. (E) Dsel expression. The bold lines indicate the level of sections in F-H. (F-H’) Dsel expression appears in the cranial neural crest (indented arrowheads) and trigeminal ganglia. Note expression domain in the prechordal mesendoderm. Apparent are low-level transcripts in the entire ventral brain and robust bilateral expression domains in the ventral marginal zone of the mid- and hindbrain (arrows). fb, forebrain; hb, hindbrain; he, heart; mb, midbrain; no, notochord; pm, prechordal mesendoderm; V, trigeminal ganglion. Scale bars are 1 mm (A-H) and 200 μm (B’-H’). |
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dsel (dermatan sulfate epimerase like) gene expression in Xenopus laevis embryo, assayed via in situ hybridization, NF stage 33 &34, lateral view, anterior left, dorsal up. |
