Genetic Characterization of Infectious Bursal Disease Viruses Associated with Gumboro Outbreaks in Commercial Broilers from Asyut Province, Egypt

Figure 6

Peaks identified as potential antigenic sites within the deducted amino acid sequence of the hypervariable region of VP2 gene from amino acid residues 183 to 356 (numbering system of Bayliss et al., 1990 [10]). The seven examined strains are being compared. The numbers below strain are as follows: number 1 indicates the five major antigenic peaks described. The arrow shows the missing antigenic peaks numbers 4 and 2 in strains 3 and 4, respectively, as well as changes in the topography of major antigenic peak number 5 in the strains 4 and 7.