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Chronic lymphocytic leukaemia (CLL) is characterised by the accumulation of mature B lymphocytes. Defects in the tumour suppressor gene p53 pathway are known to be important in CLL and p53 inactivation is associated with a particularly aggressive form of CLL. A single nucleotide polymorphism (SNP) in codon 72 of TP53 leads to a single amino acid change leading to a change in apoptotic potential and...