Abstract
Evidence is presented here for a close linkage between Akv-2, an ecotropic provirus found uniquely on chromosome 16 of AKR/N mice, and the immunoglobulin λ 1 light chain locus, Igl-1. No recombinants between the Igl-1 locus and Akv-2 were found by Southern blot analysis of DNA obtained from progeny of the backcross of (AKR/N × SJL/J)F1 to SJL/J, indicating that these genes map within 5.9 cM of each other. A probe specific for the flanking sequence of Akv-2 was used to detect the provirus, while one specific for the IgI-1 constant region was used to determine which allele of the structural gene was expressed in the backcross mice. The constant region of Igl-1 differs between AKR/N and SJL/J with respect to a site for the restriction endonuclease KpnI. This backcross was also used to seek recombinants between the regulatory, Igl-1r, and structural, Igl-1, loci of the immunoglobulin light chain locus, since the existence of such recombinants would prove that these loci are distinct. Since only parental types were recovered in the offspring, the structural and regulatory loci are no more than 2.3 cM apart, and the implications of this finding are discussed.
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Epstein, R., Lehmann, K., Cohnr, M. et al. Linkage of the Igl-1 structural and regulatory genes to Akv-2 on chromosome 16. Immunogenetics 19, 527–537 (1984). https://doi.org/10.1007/BF00403444
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DOI: https://doi.org/10.1007/BF00403444