Journal
NATURE REVIEWS IMMUNOLOGY
Volume 4, Issue 7, Pages 541-552Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nri1395
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Class-switch recombination (CSR) of immunoglobulin heavy chains is the genetic process by which a B cell switches from the production of IgM to the production of IgG, IgE or IgA. Although the general characteristics of CSR have been known for some time, the detailed molecular mechanism of this process is only now emerging. CSR is unique, in that it seems to involve transcription-generated, higher-order RNA - DNA structures, specific DNA deamination and several DNA-repair pathways. In this review, we discuss our current knowledge of the mechanism of CSR and highlight the important unanswered questions.
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