secretory immunoglobulin A

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se·cre·to·ry im·mu·no·glob·u·lin A

a subclass of IgA that is found primarily in secretions such as tears and colostrum. This form of IgA is protected from proteolytic degradation by the presence of a secretory component.

secretory immunoglobulin A,

n protein found in bodily secretions; can protect against antigen overload by binding the antigens and transporting them through the liver into the bile to be eliminated. In some cases it can prevent the absorption of antigens.
References in periodicals archive ?
Data regarding secretory immunoglobulin A in saliva and cytokines concentrations are shown as medians (interquartile range) and represents the relation between Pre- and Post-treatment concentration [(Post/Pre) x 100].
Secretory immunoglobulin A (sIgA) is secreted at mucosa, where it plays an important defensive role against invading microorganisms.