Multiple sequences related to a constant-region kappa light chain gene in the rabbit genome - PubMed (original) (raw)
Multiple sequences related to a constant-region kappa light chain gene in the rabbit genome
O Heidmann et al. Cell. 1982 Mar.
Abstract
Four allelic genes control kappa light chain allotypes in the rabbit. Amino acid sequence studies have revealed an extensive divergence (22%--33%) in the alternative forms of the kappa constant region (b4, b5, b6 and b9). Furthermore, independent studies have shown that a rabbit could express a wrong allotype. To assess the hypothesis that b allotypes are encoded by duplicated genes with a polymorphic control mechanism, we have analyzed the DNAs of four different homozygous rabbits using the Southern blot hybridization technique, with a cloned b4 C kappa probe. DNAs of individual b4, b5, b6 and b9 rabbits were cleaved with Eco RI, Kpn I and Pst I restriction endonucleases. Comparative analysis of restriction patterns shows that all four rabbit DNAs contain multiple DNA fragments hybridizing with the probe under low- and high-stringency washing conditions. In addition, each restriction pattern is distinct, suggesting that the C kappa genes are organized differently in animals expressing different allotypes.
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