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Review Question - QID 214430

Antibodies Antibody Variation and Diversity QID: 214430 (M1.OMB.1)
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QID 214430 (Type "214430" in App Search)
A 10-year-old boy is brought to his pediatrician with a 1-week history of rash. His mom says that the rash appeared first on his elbows and later appeared behind his knees and on his trunk. The patient says that the rashes are extremely itchy and he has noticed some crusting from where he scratches them. His past medical history is significant for recurrent colds and soft tissue abscesses. Physical exam reveals the appearance shown in Figure A. The antibody that is most likely abnormal in this patient normally has which of the following functions?
  • A
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  • A