这个研究小组应用的是所谓的SOD - 1鼠，被设计成携带一个遗传形成ALS的突变的人类基因。
The research team used so-called SOD-1 rats, animals engineered to carry a mutated human gene for an inherited form of als.
通过对36个不同的物种的部分DNA结构进行比较，研究小组统计出约有12%的人类基因组是保守的——这是基于序列保守所统计出的数字的两倍。
By comparing a portion of DNA structure across 36 different species, the team estimates that 12% of the human genome is conserved - twice the estimate based on sequence conservation.
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