Fig. 3

Amino acid sequences of hypervariable regions (HVRs) HVR-I, HVR-II, and HVR-III of the spike protein from Saudi strains of infectious bronchitis virus compared with reference and vaccine strains. This figure illustrates the deduced amino acid sequences of the hypervariable regions (HVRs) HVR-I, HVR-II, and HVR-III of the spike protein from infectious bronchitis virus (IBV) isolates collected in Saudi Arabia. The sequences are compared to those of the reference and vaccine strains