Fig. 4From: Molecular characterization and phylogenetic analysis of porcine epidemic diarrhea virus strains circulating in China from 2020 to 2021Comparison of the antigen epitopes of S proteins of field strains and the vaccine strains. Dots indicate the amino acids which are identical to those of reference strains. The colored amino acids indicate the mutations in the neutralizing epitopes S1A, COE, SS2, SS6, and 2C10. The red box shows the S-INDEL like strain sequenceBack to article page