Table 2.

Sequences of the primers used in this study.

^a Underlining indicates restriction enzyme sites (Bam HI and Sal I) introduced into each primer. The boxed ATGs and TAAs are the start codon and stop codon, respectively, which were introduced into the primers of each N gene fragments.

^b The nucleotide positions correspond to those in the sequence of the IBV tl/CH/LDT3/03 N gene with GenBank accession no. AY702975.