Enamel knot

In tooth development, the enamel knot is a localization of cells on an enamel organ that appear thickened in the center of the inner enamel epithelium. The enamel knot is frequently associated with an enamel cord. ==The enamel knot as signaling center== The enamel knot is a signaling center of the tooth that provides positional information for too
Found on http://en.wikipedia.org/wiki/Enamel_knot
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