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A 7-Month-Old Boy Is Evaluated in the Clinic for Recurrent

Question 4

Multiple Choice

A 7-month-old boy is evaluated in the clinic for recurrent bacterial infections.His tonsils are not visible on physical examination.Serum immunoglobulin A (IgA) and IgG levels are markedly decreased,and serum IgM levels are slightly below normal.The gene identified in this patient plays a critical role in receptor binding to all of the following ligands EXCEPT:


A) Interleukin (IL) -2
B) IL-4
C) IL-7
D) IL-12
E) IL-15

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