Fig. 6

Comparison of linear B cell epitope structures and corresponding amino acids of the S1 domain of AH2019-H and CHN-GX81–2018 representative strains. A Amino acid sequences corresponding to linear B cell epitopes of the S1 domain. The amino acid sequences of predicted linear B-cell epitopes are shown in red letters. Blue highlights indicate identical amino acid sequences in predicted epitopes between the two representative strains. The numbers on both sides of the amino acid sequences indicate the beginning and ending amino acid positions in the peptide segment relative to the S glycoprotein of corresponding viruses. B Three-dimensional structural map of epitopes in the S1 domain of the S glycoprotein of virus CHN-GX81–2018. The position of the epitope in the three-dimensional structural map is circled by a dashed circle. Black dots indicate sites of amino acid variation. C Three-dimensional structural map of epitopes in the S1 domain of the S glycoprotein of AH2019-H virus