Immunoglobulin A (IgA )

    [ Immunoglobulin A, IgA, sIgA ]

    Immunoglobulin A (IgA or sIgA) is an antibody, functionally part of the adaptive immune system, that defends the mucous membranes. It represents about 15% of total immunoglobulins produced.

    sIgA is the secretory version of the antibody.