Efficient Expression and Purification of Recombinant Mouse Dimeric IgA

Immunoglobulin (Ig) A is the main antibody isotype found on mucosal surfaces in mammals, where it is predominantly present as a dimer. Here we provide an easy, scalable, efficient, and broadly applicable method to produce and purify monoclonal mouse dimeric IgA from single B cell Ig transcripts to study mucosal antibody responses at single-cell level.