Apical ectodermal ridge
Concept
Sonic hedgehog mediates the polarizing activity of the ZPA
1993 · Robert D. Riddle, Randy L. Johnson, et al. · Cell
p63 is essential for regenerative proliferation in limb, craniofacial and epithelial development
1999 · Annie Yang, Ronen Schweitzer, et al. · Nature
p63 is a p53 homologue required for limb and epidermal morphogenesis
1999 · Alea A. Mills, Binhai Zheng, et al. · Nature