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IgA Illustration and Icon
IgA
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A stylized schematic of IgA (immunoglobulin A), depicting paired antibody subunits consistent with its dimeric form. This protein molecule belongs to the humoral branch of the adaptive immune system within the field of immunology and biochemistry. IgA functions in mucosal immunity by neutralizing pathogens and toxins at epithelial surfaces. Secretory IgA (sIgA) predominates in saliva, tears, and the intestinal lumen, protecting tissues within the gastrointestinal and respiratory tracts.
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