新闻
当前位置:新闻 > 国际新闻 > 正文

科学家们如何能确认新冠病毒并非实验室产物?(2)

She added that it is very unlikely that any techniques used to genetically engineer the virus would not leave a genetic signature, like specific identifiable pieces of DNA code。

从野生型的冠状病毒进化而来

SARS-CoV-2 evolved from a previous wild coronavirus

新冠病毒的基因序列与其他在蝙蝠和穿山甲身上发现的冠状病毒基因序列相似,不止如此,这些基因序列之间的差异显示了冠状病毒进化的自然模式。

The genome of SARS-CoV-2 is similar to that of other bat coronaviruses, as well as those of pangolins, all of which have a similar overall genomic architecture。

What‘s more, differences between the genomes of these coronaviruses show natural patterns typical of coronavirus evolution, which suggests that SARS-CoV-2 evolved from a previous wild coronavirus。

与武汉病毒研究所发现的蝙蝠病毒在进化上有显著差异

SARS-CoV-2 and a bat virus in Wuhan lab significantly different in evolutionary terms 

一些媒体报道说,新冠病毒可能来自武汉病毒研究所的研究人员发现的另一种已知的蝙蝠病毒(RaTG13),因为这两种病毒的基因序列相似性高达96%。但Hayes澄清说,从进化的角度来看,它们实际上有显著差异。

Some media reports have said that SARS-CoV-2 may come from another known bat virus (RaTG13) found by researchers at the Wuhan Institute of Virology, since the genomes of the two viruses were 96 percent similar to one another。

But Hayes clarified that in evolutionary terms, this actually makes them significantly different and the two have been shown to share a common ancestor。 That means RaGT13 is not an ancestor of SARS-CoV-2。 

与其他冠状病毒有相似特性

SARS-CoV-2 shared similar features with related coronaviruses

新型冠状病毒感染人体细胞的关键在于冠状病毒的刺突糖蛋白与人体ACE2蛋白的结合,但是,其他类似的冠状病毒都具有相似的特征。而新冠病毒的刺突糖蛋白与人体细胞的结合效率之高,通过基因工程无法达到,只有自然选择才能实现。

推荐阅读

24小时热点