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On the flip side, they also found that only one copy of the mutation that "turned down" tuberin was all it took for larger hearts and early death to occur with pressure stress. Mice with tuberin "turned down" appeared normal and their hearts were the same as those in mice with normal tuberin. The same is true for notifications from social network sites such as Facebook, MySpace, and Twitter you may be receiving. To test the impact of the new tuberin mutations in living mice, the team used the same gene editing techniques to introduce the same types of tuberin…