But instead of this being a disaster for the growing mouse, these 'wrong connections' were being destroyed and replaced by correct connections, a process regulated by the BMP4 protein.
尽管这些错误的连接对生长中的老鼠是灾难性的，但通过蛋白质BMP4的控制，这个错误被摧毁和修正了。
To test the role of the BMP4 protein, researchers raised a strain of mouse that lacks the protein. They subsequently found those mice had more 'wrong' connections, which they could not get rid of.
为了测试蛋白质BMP4的作用，研究人员饲养了一种缺乏BMP4蛋白质的老鼠，他们随后发现这些老鼠大脑中有很多错误的神经连接，而且他们的大脑无法自动纠正这些错误。
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