title: [Localization of the antigenic determinants in carcinoembryonic antigen: the role of the carbohydrate component].
abstract: The majority of topographic antigenic determinants of the carcinoembryonic antigen (CEA) representing a glycoprotein were shown to contain sugar residues of the CEA carbohydrate chains. Periodate oxidation of CEA followed by reduction afforded a corresponding CEA derivate (CEA-POR), which retained 3% antigenic activity of CEA. In secondary and tertiary structures CEA-POR was proved to be close to CEA pre heated to 80 degrees C. Formation of borate complexes with sugar residues of CEA decreased the CEA antigenic activity to 5% while a but did not affect the spatial structure of its protein core.
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002272:Carcinoembryonic Antigen / Q000032:analysis* / Q000276:immunology; D002942:Circular Dichroism; D000939:Epitopes / Q000032:analysis*; D006801:Humans; D009005:Monosaccharides / Q000032:analysis* / Q000276:immunology
chemical_list: D002272:Carcinoembryonic Antigen; D000939:Epitopes; D009005:Monosaccharides
vernacular_title: Lokalizatsiia antigennykh determinant v rakovo-émbrional'nom antigene, rol' uglevodnogo komponenta.