Elucidation of IgH 3′ region regulatory role during class switch recombination via germline deletion

Abstract excerpt

In mature B cells, class switch recombination (CSR) replaces the expressed constant Cμ gene with a downstream CH gene. How the four transcriptional enhancers of the IgH 3′ regulatory region (3′RR) control CSR remains an open question. We have investigated IgG1 CSR in 3′RR-deficient mice. Here we show that the 3′RR enhancers target the Sγ1 acceptor region (and poorly the Sμ donor region) by acting on epigenetic...

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