Rat antisera raised against anti-nuclease antibodies from mouse strains A/J and SJL detect strain-specific idiotypic determinants related to the antigen-combining site. These antisera have been used to investigate the genetic linkage and strain distribution of the anti-nuclease idiotypes. Despite the existence of an H-2-linked immune response gene controlling the humoral response to nuclease, expression of the A/J anti-nuclease idiotype has been shown to be independent of genes in the H-2 region: the A/J idiotype was present in immune sera from strains A/J (H-2a) and A.BY (H-2b) but absent in sera from strains B10 (H-2b) and B10.A (H-2a). An analysis of the segregation of the A/J idiotype in offspring of the backcross (A/J x B10.A) x B10.A demonstrated linkage to the Ig-1e heavy chain allotype markers. In a small sample of backcross animals a very high apparent recombination frequency was observed, but further backcross analyses and progeny testing of putative recombinant animals will be required to substantiate this observation. Analysis of the A/J and SJL anti-nuclease idiotype markers in the BALB/c, CB.20, and BAB.14 strains indicate that these idiotypic markers may permit mapping of distinct variable region genes.
Genetic control of the immune response to nuclease. V. Genetic linkage and strain distribution of anti-nuclease idiotypes.
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C G Fathman, D S Pisetsky, D H Sachs; Genetic control of the immune response to nuclease. V. Genetic linkage and strain distribution of anti-nuclease idiotypes.. J Exp Med 1 March 1977; 145 (3): 569–577. doi: https://doi.org/10.1084/jem.145.3.569
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