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. 1987 Jan;6(1):97–102. doi: 10.1002/j.1460-2075.1987.tb04724.x

Analyses of chicken immunoglobulin light chain cDNA clones indicate a few germline V lambda genes and allotypes of the C lambda locus.

R Parvari, E Ziv, F Lentner, S Tel-Or, Y Burstein, I Schechter
PMCID: PMC553362  PMID: 3107981

Abstract

cDNA libraries of chicken spleen and Harder gland (a gland enriched with immunocytes) constructed in pBR322 were screened by differential hybridization and by mRNA hybrid-selected translation. Eleven L-chain cDNA clones were identified from which VL probes were prepared and each was annealed with kidney DNA restriction digests. All VL probes revealed the same set of bands, corresponding to about 15 germline VL genes of one subgroup. The nucleotide sequences of six VL clones showed greater than or equal to 85% homology, and the predicted amino acid sequences were identical or nearly identical to the major N-terminal sequence of L-chains in chicken serum. These findings, and the fact that the VL clones were randomly selected from normal lymphoid tissues, strongly indicate that the bulk of chicken L-chains is encoded by a few germline VL genes, probably much less than 15 since many of the VL genes are known to be pseudogenes. Therefore, it is likely that somatic mechanisms operating prior to specific triggering by antigen play a major role in the generation of antibody diversity in chicken. Analysis of the constant region locus (sequencing of CL gene and cDNAs) demonstrate a single CL isotype and suggest the presence of CL allotypes.

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Selected References

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