THE INHERITANCE OF INDIVIDUAL ANTIGENIC SPECIFICITIES OF RABBIT ANTIBODIES TO STREPTOCOCCAL CARBOHYDRATES

K. Eichmann,T. Kindt

Published 1971 in Journal of Experimental Medicine

ABSTRACT

The inheritance of individual antigenic specificities (IAS) of rabbit antibodies to the Group C streptococcal carbohydrate was demonstrated in a selectively bred rabbit family. The IAS of the antibodies from 3 proband rabbits were also observed in the Group C antibodies in as many as 7 out of 42 related rabbits, but in none of the Group C antibodies from 48 unrelated rabbits, Immunodiffusion analyses and quantitative radioprecipitin experiments revealed that this cross-specificity may be either partial or complete. Quantitative inhibition of the precipitin reaction between the proband antibody and its antiserum by preimmune IgG revealed 30-fold differences in the proportion of molecules with cross-specificity for the proband antibody. This proportion is higher in the preimmune IgG of the proband rabbit and of those relatives which produced cross-precipitating antibodies than it is in the IgG of rabbits which had the same group a allotype, but did not produce cross-precipitating antibodies. The proportion is much lower in the IgG of rabbits with a group a allotype different from that of the proband antibody. These data suggest that serologically detected individual antigenic specificities are inherited markers of immunoglobulins.

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