The IgJ protein links IgM or IgA monomers, nucleating IgM pentamers and inducing IgA dimer or polymer formation. It also binds these immunoglobulins to the secretory component. As part of the sIgA complex, IgJ integrates with IgA monomers, the J chain, and the secretory component (PIGR proteolytic product) . IgJ Protein, Human (His) is the recombinant human-derived IgJ protein, expressed by E. coli , with C-His labeled tag.
