Abstract:
:PCR analyses of the kappaL chain locus in single B-lineage cells of wild-type, Ckappa-, or JCkappa-deficient homozygous or heterozygous mice often detect multiple in- and out-of-frame rearrangements at the kappaL and lambdaL loci. They are most frequent in small pre-BII cells and equally so in wild-type and kappaL chain-deficient cells. Hence, kappaL chain production appears not to inhibit secondary rearrangements. Around 20% of all small preBII cells express IgL chains in their cytoplasm. Cells with a first productive rearrangement on one allele are favored to enter the immature B cell compartment. Thus, allelic exclusion might be secured by control of accessibility of IgL chain loci for rearrangement and by rapid selection of cells with a fitting over those with a nonfitting IgL chain.
journal_name
Immunityjournal_title
Immunityauthors
Yamagami T,ten Boekel E,Andersson J,Rolink A,Melchers Fdoi
10.1016/s1074-7613(00)80107-7keywords:
subject
Has Abstractpub_date
1999-09-01 00:00:00pages
317-27issue
3eissn
1074-7613issn
1097-4180pii
S1074-7613(00)80107-7journal_volume
11pub_type
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