File:Chicken HH20 MyoR expression 02.jpg

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MyoR and MyoD Expression domains during Chick first Branchial Arch Development

Lateral view of a HH20 chick embryo hybridized with a MyoR probe.

(A) Lateral view of a HH20 chick embryo hybridized with a MyoR probe. HH20 (B,C) embryo was frontally sectioned at the head level. The plane of section is indicated in the panel A. Adjacent sections from each stage were hybridized with DIG-labelled antisense probes for either MyoR (B) or MyoD (C).

MyoR delineates the myogenic core of the first branchial arch (B) and is subsequently expressed in all branchiomeric muscles.

MyoD transcripts are first detected in a lateral sub-region of the MyoR domain at HH20 (B,C, arrows).

  • BA1, first branchial arch,
  • di, diencephalon
  • e, eye
  • fl, forelimb
  • hl, hindlimb
  • mb, mandibular arch
  • mes, mesenchephalon
  • MR, medial rectus
  • mx, maxillary arch
  • ph, pharynx
  • tel, telencephalon
  • VO, ventral oblique
  • VR, ventral rectus.
  • MyoR - (Myogenic Repressor) basic helix-loop-helix (bHLH) factor expressed in undifferentiated myoblasts and downregulated during differentiation. OMIM603628

Links: Image - MyoR | Image - MyoR and MyoD | Head Development | Chicken Development | Molecular Development


<pubmed>19198652</pubmed>| PLoS One.


© 2009 Grenier et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Grenier J, Teillet M-A, Grifone R, Kelly RG, Duprez D (2009) Relationship between Neural Crest Cells and Cranial Mesoderm during Head Muscle Development. PLoS ONE 4(2): e4381. doi:10.1371/journal.pone.0004381

Figure 1. journal.pone.0004381.g001.jpg Original figure altered in size and labelling.


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