Mammary tumor initiation is not delayed by Mogat2 gene depletion. (a) Whole mount images of the fourth pair of mammary glands from Mogat2^+/+PyMT and Mogat2^−/−PyMT mice at 5 weeks old. Ln = lymph node. (b) Kaplan Meier plots of the tumor latency of Mogat2^+/+PyMT (n = 19) and Mogat2^−/−PyMT (n = 21) mice. Data were analyzed by the log-rank test. All mice were fed a normal diet (10% of calories from fat).