Figure 2. Alignment of the deduced amino acid sequences of the complete S proteins of JSCZ1601 and several representative PEDV strains.

Deletions and insertions are shown as grey bars. Key amino acid mutations within the different strains are shown as black boxes, and the N-glycosylation sites are indicated by short lines. (a) Alignment of the sequences of all the selected PEDV strains. (b) Alignment after removing three PEDV strains, FJAX1, FJAX2, and HLJ2015/DP1-1, in which the S genes were partial.