The deduced amino acid sequence comparison and hydrophobicity profiles of the gp2 proteins between the 7 isolates and reference viruses. A, The deduced amino acid sequence comparison of the gp2 proteins between the 7 isolates from China (GenBank accession no. EU017510, EU177103, EU177108, EU177117, EU255922, EU642603 and EU653015) and another Chinese isolates (BJ-4) (GenBank accession no. AF331831), VR2332 (GenBank accession no. EF536003) and MLV (GenBank accession no. AF159149) available in GenBank. Only the amino acids different from those in the consensus sequence are indicated. The black boxed residues indicate the immunodominant B-cell linear epitopes AA position sites. B, Hydrophobicity profiles of ORF2 generated by the Kyte and Doolittle method using DNAstar program. Major areas of difference are indicated by arrows. a, LS-4 was a representative of other five isolates because the same plots were shown for ST-7, GCH-3, HM-1, HQ-5, HQ-6 and LS-4. b, VR2332 was a representative of other three reference virus because the same plots were shown for BJ-4 and MLV.