Immunoglobulin A (IgA) is an antibody that plays a critical role in mucosal immunity. IgA can exist in a dimeric form called secretory IgA (sIgA). In its secretory form, IgA is the main immunoglobulin found in mucous secretions, including tears, saliva, colostrum, and secretions from the genitourinary tract, gastrointestinal tract, prostate, and respiratory epithelium. It is also found in small amounts in blood. The secretory component of sIgA protects the immunoglobulin from being degraded by proteolytic enzymes. Thus, IgA can survive in the harsh gastrointestinal tract environment and provide protection against microbes that multiply in body secretions.
Goat Anti-Human IgA (polyclonal)-148Nd—100 Tests