The role of furin cleavage site in SARS-CoV-2 spike protein-mediated membrane fusion in the presence or absence of trypsin

Abstract excerpt

The rapid spread of SARS-CoV-2 (also known as 2019-nCoV and HCoV-19 1 ), a novel lineage B betacoronavirus (βCoV), has caused a global pandemic of coronavirus disease (COVID-19). It has been speculated that RRAR, a unique furin-like cleavage site (FCS) in the spike protein (S), which is absent in other lineage B βCoVs, such as SARS-CoV, is responsible for its high infectivity and transmissibility. 2

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