Patent ID: 7431930

Claim:
A classic infectious bursal disease virus (IBDV) mutant that expresses a VP2 protein that binds with monoclonal antibody (moab) B69, wherein the VP2 protein also binds with moab 67, secreted by hybridoma cell lines HB-9437 and HB-11122, deposited at the ATCC, Rockville, USA, respectively, wherein the mutant comprises one or more mutations in a classic VP2 coding region, such that the coding region comprises, (i) a codon for the amino acid at position 222 encoding an amino acid selected from the group consisting of serine and threonine, and (ii) a nucleotide sequence encoding an amino acid sequence selected from the group consisting of SEQ ID. No. 2, SEQ ID. No. 3, SEQ ID. No. 4 and SEQ ID. No. 5 at positions 318-323.