title: Biochemical comparative studies between eye- and brain-derived growth factors.
abstract: Two bovine brain-derived growth factors, BDGF I and BDGF II, were isolated using the same extraction procedure as previously described for eye-derived growth factors (EDGF). The hypothesis that these growth factors were identical to EDGF I and EDGF II, respectively, was supported by their similar molecular weights (16,000 and 15,000, respectively) and isoelectric points (9.0 and 5.0, respectively), their identical retention behavior on reverse-phase chromatography and their similar amino acid compositions. From studies on their binding properties to cell surfaces, competition between EDGF I and BDGF I as well as competition between EDGF II and BDGF II to the same receptor was observed. The amino terminal sequence of EDGF II (1-16) was shown to be identical to the amino acid residues (7-22) of the acidic FGF, strongly confirming our observations on the identity of the factors isolated from bovine brain and retina.
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000032:analysis; D000818:Animals; D001667:Binding, Competitive; D001923:Brain Chemistry; D002417:Cattle; D002845:Chromatography; D002851:Chromatography, High Pressure Liquid; D004591:Electrophoresis, Polyacrylamide Gel; D006133:Growth Substances / Q000302:isolation & purification* / Q000378:metabolism; D007526:Isoelectric Point; D008969:Molecular Sequence Data; D008970:Molecular Weight; D011869:Radioligand Assay; D012160:Retina / Q000032:analysis*
chemical_list: D000596:Amino Acids; D006133:Growth Substances