title: Bovine fetus-specific serum proteins. Purification and characterization of alpha1-fetoprotein and immunological identification of alpha2- and beta-fetoproteins.
abstract: Bovine alpha1-fetoprotein was isolated from fetal calf serum by successive procedures of concanavalin A-Sepharose chromatography, DEAE-Sephadex chromatography, SP-Sephadex chromatography and preparative disc polyacrylamide gel electrophoresis. The bovine alpha1-fetoprotein preparation was considered homogeneous by several physicochemical and immunochemical criteria. Bovine alpha1-fetoprotein has a molecular weight of 68 000 with an amino acid composiotn similar to that of other mammalian alhpa1-fetoprotein. In addition, bovine alpha1-fetoprotein was shown to exist as two distinct variants on the basis of carbohydrate heterogeneity. alpha2-Fetoprotein and a new beta-fetoprotein were immunologically identified in fetal calf serum. These fetoproteins, like alpha1-fetoprotein, were not detectable in non-pregnant cow serum by immunoelectrophoresis.
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000818:Animals; D000941:Antigens / Q000032:analysis; D002417:Cattle; D003429:Cross Reactions; D005326:Fetal Proteins / Q000276:immunology*; D006801:Humans; D008970:Molecular Weight; D012756:Sheep; D013045:Species Specificity; D013552:Swine; D000509:alpha-Fetoproteins / Q000276:immunology / Q000302:isolation & purification*
chemical_list: D000596:Amino Acids; D000941:Antigens; D005326:Fetal Proteins; D000509:alpha-Fetoproteins