During the course of sea urchin development, from early blastula to pluteus larva, there are two major visible processes toward which all activities seem to be focused. They are the differentiation of the larval skeleton by the primary mesenchyme cells and the differentiation of the primitive gut by
✦ LIBER ✦
Short-Range Cell–Cell Signals Control Ectodermal Patterning in the Oral Region of the Sea Urchin Embryo
✍ Scribed by Jeff Hardin; Norris Armstrong
- Book ID
- 115597713
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 738 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0012-1606
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## Abstract The entry of β‐catenin into vegetal cell nuclei beginning at the 16‐cell stage is one of the earliest known molecular asymmetries seen along the animal–vegetal axis in the sea urchin embryo. Nuclear β‐catenin activates a vegetal signaling cascade that mediates micromere specification an