Fig. 5From: A single amino acid substitution alter antigenicity of Glycosylated protein 4 of HP-PRRSVMultiple sequence alignment results of GP4 AR. Sixty-eight strains of AR (from 29 to 56 AAs of GP4) from reported PRRSV stains were used in this analysis. The mutation at site 43 in the AR was conspicuous. Continual mutation occurred at site 43 (S → G → D → N)Back to article page