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Wiesmuller L et al. - The authors show that depending on the individual mutation, p53 mutants retain more or less partial DSB repair downregulatory activities when compared with loss of p53. All in all, relative effects on distinct DSB repair pathways and discrimination between HR substrates with perfectly versus imperfectly homologous sequences represent good markers for a p53 defect due to a specific mutation. Thus, advanced DSB repair analysis may serve as a novel assay for the functional classification of p53 mutations.

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