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According to an article by ShanghaiTech University Furin cleavage sites naturally occur in coronaviruses Stem Cell Research Volume 50, January 2021: SARS-CoV-2 has the furin recognition motif at S1/S2, causing by a 12-nucleotide insertion not presented even in its closest relatives (Walls et al., 2020, Coutard et al., 2020). This stimulates a conspiracy ...


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