title: Chick embryo nerve growth factor. Fractionation and biological activity.
abstract: A nerve growth factor (NGF)-like factor initiating nerve fibre outgrowth from sympathetic ganglia in culture was partially purified from chick embryo extract by cation-exchange chromatography followed by hydrophobic interaction chromatography on octylsulfide agarose. The NGF-like factor was markedly activated upon gel filtration in the presence of 6 M urea. Further analysis of the activated chick NGF by immunoblotting following SDS-PAGE, and by inhibition of bioassay response using antibodies to mouse beta NGF demonstrated a distinct antigenic cross-reactivity. The size of the chick embryo NGF was also indistinguishable from that of the mouse beta NGF with a molecular weight (MW) of about 14,000. The findings demonstrate directly the presence of biologically active NGF protein in the developing 18-day chick embryo.
mesh_terms: D000818:Animals; D001681:Biological Assay; D002642:Chick Embryo; D002845:Chromatography; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D009414:Nerve Growth Factors / Q000302:isolation & purification / Q000502:physiology*
chemical_list: D009414:Nerve Growth Factors