Result: The glycan-masking Ad-S-D428N in RBD also elicited more potent neutralizing antibodies against the Wuhan-Hu-1 ancestral strain but only increased the cross-neutralizing antibody titers against the Alpha (B.1.1.7) and Beta (B.1.351) variants.
Discussion: We introduced seven separate N-linked glycosylation sites into the S glycoprotein, S-F135N/N137T, S-R158N/Y160T, Ad-S- N354/K356T, S-N370/A372T, Ad-S-