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. 2009 May 13;136(12):1995–2004. doi: 10.1242/dev.035592

Fig. 3.

Fig. 3.

Hoxb4 expression patterns during early chick development. (A-G) Whole-mount RNA in situ hybridization (ISH) using a Hoxb4 probe. Hamburger and Hamilton (HH) stages are indicated. Black arrows mark Hensen's node. Red arrows in B-D point to gastrulating cells expressing Hoxb4. Red lines mark the sixth somite axial level. (A-F) Ventral view; (G) dorsal view. (H-K) Cross-sections at the level of H-K in C,F. Dashed circles mark the IM (J,K). (L) Scheme of the expression patterns of several Hox genes in the IM of a chick embryo. Bars with a blue margin represent Hox genes that have an anterior boundary at the sixth somite level. NE, neuroepithelium; m, mesoderm; NT, neural tube; s, somite; LPM, lateral plate mesoderm. Scale bars: 100 μm.