ATM and TP53 mutations or deletion found in MCL patient specimens have also been reported in several MCL cell lines, particularly deletion of ATM with gain-of-function mutations of TP53 (Maver-1) and deletion or mutations on both ATM alleles with heterozygous deletion of TP53 (Granta-519) (Fig. 1c and Supplementary Table S1). Here, ATM is linked to mantle cell lymphoma.