A 20-Year-Old Man Is Evaluated in the Emergency Department for Weakness

A 20-year-old man is evaluated in the emergency department for weakness, malaise, and dark urine.  The patient was treated for a bacterial skin infection several days ago.  Physical examination shows scleral icterus.  Laboratory results reveal anemia with an elevated reticulocyte count.  Abnormal erythrocytes are seen on peripheral smear.  Which of the following substrate flow pathways is most likely deficient in this patient?

A) A
B) B
C) C
D) D
E) E
F) F
G) G

Correct Answer:

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