The in vitro maintenance of the apical ectodermal ridge of the chick embryo wing bud: an assay for polarizing activity.
D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo / Q000254:growth & development*; D046508:Culture Techniques; D004475:Ectoderm / Q000166:cytology / Q000378:metabolism; D005865:Gestational Age; D008264:Macrophages / Q000166:cytology; D008648:Mesoderm / Q000166:cytology / Q000378:metabolism; D009949:Orientation; D013997:Time Factors; D014921:Wings, Animal / Q000033:anatomy & histology / Q000196:embryology*