The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 129, 1217-1233, Copyright © 1969 by The Rockefeller University Press

ARTICLE

INDIVIDUAL ANTIGENIC SPECIFICITY OF HUMAN MACROGLOBULINS : LOCALIZATION OF ANTIGENIC DETERMINANTS AND THEIR USE TO DEMONSTRATE FORMATION OF HYBRID MOLECULES AFTER REDUCTION AND REASSOCIATION



M. Harboe M.D.1, B. G. Solheim M.D.1, and Johanna Deverill 1

1 From the Institute for Experimental Medical Research, University of Oslo, Ullevål Hospital, Oslo 1, The Norwegian Defense Research Establishment, Kjeller, and Forsvarets Sanitet, Oslo, Norway

The localization of individually specific antigenic determinants on the monoclonal gammaM Mö was studied in gel diffusion experiments with 19S gammaM Mö and its 7S subunit. Various types of such determinants were delineated. Some were demonstrable both on the intact macroglobulin molecule and on the subunit. The latter was often unable to precipitate with the corresponding antibody, but combined with it and inhibited precipitation. Immunization of rabbits with purified gammaMs Mö was the most useful way to obtain antisera demonstrating individually specific antigenic determinants on the subunit by direct precipitation. Still other determinants were apparently destroyed by mild reduction of the gammaM molecule.

Reduction and reassociation of mixtures of two monoclonal gammaM-globulins resulted in formation of hybrid molecules containing subunits of different origin. Individually specific antisera against the two components were useful for demonstrating hybrid formation. Serological activity, i.e., cold agglutinin activity, was present in the hybrid molecules.

 Submitted on January 20, 1969


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