S2 subunit plays a critical role in pathogenesis of TW-like avian coronavirus infectious bronchitis virus
Description
To investigate the critical role of the S gene in determining pathogenesis of TW-like avian infectious bronchitis virus (IBV), we generated two recombinant IBVs (rGD(aGD-S1) and rGD(aGD-S2)) by replacing either the S1 or S2 region of GD strain with