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The Journal of Immunology, Vol 147, Issue 8 2771-2776, Copyright © 1991 by American Association of Immunologists
ARTICLES |
E Paul, A Livneh, AJ Manheimer-Lory and B Diamond
Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461.
We report the cDNA sequence of an expressed human V lambda II gene and present an RFLP analysis of the Ig gene family defined by this clone. This V lambda II gene was expressed in a monoclonal B cell line generated from a patient with SLE by transformation with EBV. The encoded lambda L chain displays the 8.12 Id, an Id common to anti-DNA antibodies from patients with SLE. Using a coding region probe we estimate from Southern blot analysis that the germline V lambda II gene family contains at least 15 members. Many of the V lambda II restriction fragments are polymorphic both in SLE patients and in nonautoimmune individuals. EcoRI, HindIII, and TaqI RFLP analyses of the V lambda II gene family and EcoRI analysis of the C lambda gene family reveal no polymorphisms specific to SLE. Observed V lambda II and C lambda allele frequencies are the same among SLE patients and nonautoimmune individuals, and show no evidence of linkage disequilibrium between the two loci.
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