Expression of c<i>Axin2</i> in stages HH 11 to HH 15.

<p>Overviews (A, B, C) and transversal sections of chicken embryos. Green bars in overviews indicate sectioning level (C). (A) HH 11: <i>Axin2</i> expression in the head, <i>pnp</i>, <i>nt</i> and (A, A.1) <i>dml</i> of the <i>so</i> (black arrow). (B) HH 14: strong expression in the <i>dml</i> (black arrow). (B.1) transversal section through the head at mid-brain level with transcripts in the medial head fold in in the adjacent neighbouring mesenchyme (black arrow). (C) HH 15: <i>Axin2</i> expression in the brain (white arrow), the <i>dml</i> (C.1 black arrow) and in the <i>pnp</i>. (C.2) expression in the <i>snc</i> and in the ventral <i>snt</i>. (C.3, C.4) <i>Axin2</i> expression in the <i>tbm</i>. (C.5) section through head and neck with expression of <i>Axin2</i> in the <i>oc</i>, the neighbouring <i>hb</i> and the <i>ov</i>. pnp-posterior neuropore, nt-neural tube, dml-dorso-medial lip, so-somites, snc-secondary notochord, snt-secondary neural tube, tbm-tail bud mesoderm, oc-otic cup, hb-hind-brain, ov-optic vesicle.