Tissue culture studies; isolation of the active components in the ultrafilterable portion of the chick embryo extract.
D000818:Animals; D002642:Chick Embryo; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D005347:Fibroblasts; D009414:Nerve Growth Factors; D009584:Nitrogen; D046509:Tissue Culture Techniques
D009414:Nerve Growth Factors; D009584:Nitrogen
EMBRYO; TISSUE CULTURE