Localization of the antigenic determinants in carcinoembryonic antigen: the role of the carbohydrate component
Pavlenko, A.F.; Kurika, A.V.; Chikalovets, I.V.; Korzhikov, I.A.; Glazunov, V.P.
Bioorganicheskaia Khimiia 13(6): 814-817
1987
ISSN/ISBN: 0132-3423 PMID: 2445351 Document Number: 296234
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.