DNA polymerase eta is a limiting factor for A:T mutations in Ig genes and contributes to antibody affinity maturation.

Abstract excerpt

DNA polymerase eta (POLH) is required for the generation of A:T mutations during the somatic hypermutation of Ig genes in germinal center B cells. It remains unclear, however, whether POLH is a limiting factor for A:T mutations and how the absence of POLH might affect antibody affinity maturation. We found that the heterozygous Polh+/- mice exhibited a significant reduction in the frequency of A:T mutations in Ig...

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