Fig. 6From: Influence of the amino acid residues at 70 in M protein of porcine reproductive and respiratory syndrome virus on viral neutralization susceptibility to the serum antibodyAlignment of partial M (a) and GP2 (b) aa sequences of BB20s with wild-type PRRSV isolates. The 70 aa site in M and 198 aa site in GP2 of BB20s and the same sites of the field PRRSV isolates are indicated by black boxesBack to article page