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. 2021 Feb 17:1–20. doi: 10.1080/10408363.2021.1884640

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Figure 1. — The general structure of SARS-CoV-2. Major structural proteins, namely, the spike protein (S), membrane protein (M), and envelope protein (E), are present on the viral envelope. The nucleocapsid protein (N) along with the genomic RNA is present inside the viral envelope (above). SARS-CoV-2 RNA genome has a 5’ methylated cap and a 3’ poly-A tail. The positions of the genes encoding the nonstructural proteins (NSP) and spike (S), membrane (M), envelope (E), and nucleocapsid (NC) proteins are shown (below).