Scales into feathers--an effect of retinoic acid on tissue interactions in the developing chick.
D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D002642:Chick Embryo; D005241:Feathers / Q000187:drug effects / Q000196:embryology*; D012867:Skin / Q000187:drug effects / Q000196:embryology*; D014212:Tretinoin / Q000494:pharmacology*
D014212:Tretinoin