Amino acid sequence comparison of the nsp2 proteins between the 7 isolates from China (GenBank accession no. EU075304, EU177102, EU255920, EU669820, EU255919, EU653014 and EU642604) and another isolates NVSL 97-7895 (GenBank accession no. AY545985), VR2332 (GenBank accession no. EF536003) and MLV (GenBank accession no. AF159149) available in GenBank. Dots indicate amino acids identical to LS-4 and deletions are indicated by dashes (--). The black boxed residues indicate the putative linear B epitopes. The blue dot boxed indicate a deletion of AA.