SARS-CoV-2(11) peptide(8) RBD(8) peptides(8) Protein(5) acute respiratory syndrome(5) Interaction(5) the spike protein(4) spike(4) fusion(4) the Spike(4) infection assay(4) Selection(4) RBD mutations(4) epitope(4) naïve(4) COVID-19(4) neutralization(4) reaction(4) N-terminus(4) neutralize(4) spread of COVID-19(4) SARS-CoV-2 variants(4) approved(4) NTD(4) were used(4) implicated(4) angiotensin-converting enzyme 2(4) breadth(4) novel(4)