XB-ART-11416
Mol Immunol
1999 Dec 01;3617:1159-68. doi: 10.1016/s0161-5890(99)00123-6.
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Junctional diversity in Xenopus immunoglobulin light chains.
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Xenopus cDNA sequences encoding the homolog of mammalian kappa (kappa) light (L) chains were isolated from isogenic tadpole and adult individuals to investigate whether there existed stage-specific immunoglobulin L chain expression and somatic diversification. In the course of these studies rearrangements to a sixth J(L) gene segment and a pseudogene (J(L)psi) were found, and it is suggested that the order of these gene segments with respect to the L chain constant (C) region exon is: J(L)6-J(L)1-J(L)2-J(L)3-J(L)4-J(L)5-J(L)psi-C(L). The cDNA junctional diversity was analyzed; few N and P regions were found and almost all the CDR3 were 9 codons in length. There were restricted patterns of recombination site resolution, and this is attributed to some constraint in JL coding end processing.
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