TABLE 1.

Primer sequences

Primer	Sequence
BamHI-BCP-F	5′-GGATCCGACGATAGTGTGAAGACTAC-3′
EcoRI-BCP-R	5′-GAATTCAAAAGAAAGGACAAAATGCG-3′
IgA-F	5′-CAAATGAAGATAAAGATTCTGATATTCGTAAACAAGCTCAACAAGC-3′
IgA-R	5′-GCTTGTTGAGCTTGTTTACGAATATCAGAATCTTTATCTTCATTTG-3′