Glycosylation pattern of the monomeric S-glycoprotein of SARS-CoV-2. (A) High-mannose type glycans (colored yellow) of the monomeric S-glycoprotein of SARS-CoV-2 susceptible to be specifically recognized by Man-specific lectins KAA-2 and HRL-40 from the red algae Kappaphycus alvarezii [10,13] and Halimeda ronschii [14], and OAA from the blue-green alga (cyanobacterium) Oscillatoria agarddhii [16], are well exposed at the top of the protein. Other complex N-glycans decorating the monomer weakly or not recognized by the lectins, are colored cyan. (B) High-mannose type glycans (colored yellow) of the monomeric S-glycoprotein of SARS- CoV-2 susceptible to be specifically recognized by the Manα1,2-specific lectin BCA from the green alga Boodlea coacta [11]. Other complex N-glycans decorating the monomer weakly or not recognized by BCA, are colored cyan.