Regulation of the quality of DNA repair by timing in the cell cycle

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During responses to infection or immunisation, antibody-producing _B� cells mutate their antibody genes at extreme rates. Rare mutations which improve the antibodies are selected by competition between B cells favouring those which make the best antibodies: Darwinian evolution on extreme _fast-forward�. We aim to understand this process because it is essential for normal immunity and effective vaccination, and because when it goes wrong, it can cause aggressive human cancers.