Which statement about antibodies in the class IgE is true?
A) They are secreted by mast cells in skin.
B) They differ extensively in amino acid sequences of constant regions.
C) They are found primarily in saliva and tears.
D) They have the same general structure as antibodies in class IgA.
E) They bind to basophils and mast cells, ultimately triggering release of histamine.
Correct Answer:
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