Athens - Model 16-16-090701-1M - Immunoglobulin A1 (IgA1), Human Myeloma Plasma- Brochure

In normal adult serum, the approximate percentage composition of IgA with respect to is subclasses is IgA1:90% and IgA2:10%. In secretory IgA, the subclass proportions may approach 50:50. The clinical significance of the subclasses has yet to be determined.