Antibody
Which is not a function of IgG?

Involved in opsonization
Activates or fixes complement
Major antibody in serum
First antibody type produced against an antigen during the primary antibody response

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Antibody
The secretary component of sIgA is

made by T cells
formed by cleavage of an epithelial cell receptor used to transport the dimeric IgA across the epithelial cell
made by plasma cells that secrete dimeric IgA
added to dimeric IgA by the M cell

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