Secretory IgA antibodies are unique because they
A) have unique light chains.
B) are Y-shaped molecules.
C) are present in the plasma.
D) are connected with J chains and short polypeptides to form dimers.
E) are present in lymph nodes.
D
Bloom's Taxonomy: Comprehension
Section: Elements of Adaptive Immunity
Learning Outcome: 16.18
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