并对辊端叉头的结构和维护提出改进意见。
Meanwhile, the improvement advices for the structure and maintenance of the roller end clevis are provided.
结论：敲除叉头框c 2基因可使小鼠室间隔发育缺损。
Conclusion Targeting mutation of Fox C2 gene can result in ventricular septal defect.
方法：通过敲除小鼠叉头框c 2基因，解析敲除叉头框c 2基因小鼠的心脏发育情况。
Methods Fox C2 deficient mice were reproduced by targeting mutation and the developmental anomaly in heart was analyzed.
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