Fig. 2. mRNA expression of X. laevis Id2 (A, B, C) and Id3 (D, E, F). In all cases, anterior is to the left. (A, B, D, E) are dorsal views, (C and F) are lateral views. (A) Stage 15 embryo stained with Id2. Bilateral stripes at midline marked by black asterisk. Expression in the lateral plate mesoderm (red arrowheads) extends ventrally away from the viewer. (B) Stripe in the rhombencephalon (blue arrowhead) and population of cells that could be migrating crest (blue arrow). Staining in the lateral plate mesoderm has coalesced (red arrowheads). (C) Id2 is expressed in the eyes, branchial arches, brain structures, kidneys (red arrowhead), segmented myotome (m), and anterior blood islands (b). (D) Expression of Id3 at stage 11 is throughout the ectoderm but not in the blastopore (at right). (E) Stage 18 embryo stained with Id3. Expression is strong in the anterior neural plate, extending posteriorly to a stripe in the hindbrain (open red arrowhead) and a smaller stripe posterior (closed red arrowhead). Expression extends posteriorly throughout the neural plate. (F) Id3 is expressed in the most dorsal and ventral portions of the myotome (m).
Image published in: Liu KJ and Harland RM (2003)
Copyright © 2003. Image reproduced with permission of the Publisher, Elsevier B. V.
| Gene | Synonyms | Species | Stage(s) | Tissue |
|---|---|---|---|---|
| id2.L | xid2 | X. laevis | Throughout NF stage 15 | lateral plate mesoderm neural groove neural plate |
| id3.L | heir-1, id3-a, id3-b, xid3, xidia, xIdx | X. laevis | Throughout NF stage 11 | ectoderm |
| id2.L | xid2 | X. laevis | Throughout NF stage 33 and 34 | eye brain somite branchial arch myotome proctodeum ventral blood island pronephric kidney pronephric duct |
| id3.L | heir-1, id3-a, id3-b, xid3, xidia, xIdx | X. laevis | Throughout NF stage 18 | pre-chordal neural plate chordal neural plate anterior neural fold neuroectoderm neural plate preplacodal ectoderm |
| id3.L | heir-1, id3-a, id3-b, xid3, xidia, xIdx | X. laevis | Sometime during NF stage 33 and 34 to NF stage 37 and 38 | eye brain somite branchial arch myotome proctodeum fin head dorsal fin margin ventral fin margin pharyngeal arch mandibular arch hyoid arch spinal cord hypaxial muscle |
| id2.L | xid2 | X. laevis | Throughout NF stage 18 | lateral plate mesoderm trigeminal placode rhombomere |
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