Fig. 1.

On the right the SARS-CoV-2 structure particle: The virion has a nucleocapsid composed of genomic RNA and phosphorylated nucleocapsid (N) protein, which is buried inside phospholipid bilayers and covered by the spike glycoprotein trimmer (S). The membrane (M) protein (a type III transmembrane glycoprotein) and the envelope (E) protein are located among the S proteins in the virus envelope. On the left a detailed structure of the spike: it's consists of 3 domains, the ectodomain located in the virus crown and divided into the S1 receptor (binding subunit) and the S2 receptor (fusion subunit), the anchor and the intraviral tail (self-made figure).