These mice were intercrossed with LSL-KrasG12D;ATMloxP/+ mice to produce LSL-KrasG12D;Ptf1a+/cre, LSL-KrasG12D;Ptf1a+/cre;ATMloxP/+ and LSL-KrasG12D;Ptf1a+/cre;ATMloxP/loxP offspring, respectively named KC, KCATMΔ+ and KCATMΔΔ. Mice of the 3 genotypes were used in a survival study that was assembled to investigate the effects of ATM deficiency (partial or total) in KrasG12D-driven pancreatic tumor formation. The gene discussed is PTF1A; the disease is pancreatic neoplasm.