Fig. (1) Representative Deletions in PRRSV NSP2 gene. PRRSV JXA1 and HNjz15 were compared with stereotypical NA-PRRSV VR-2332. Five different function regions of NSP2 gene were indicated by different colors and marked according to the amino acid location in NSP2. Black arrows indicated the location on NSP2 where primers were designed. Abbreviation: Hypervariable region 1(HV1), PLP2 cysteine protease core (PL2), Hypervariable region 2 (HV2), Transmembrane region (TM), C-terminal tail (Tail).