An 8-year-old girl has a history of recurrent upper respiratory tract infections since birth. For the past two months, she has reported decreased sensation of the feet bilaterally. Serum LDH is elevated. A defect in which of the following is most likely to be seen in this patient?
Dynein arm
Erythrocyte cytoskeletal molecule
Glucocerebrosidase
Myoneural junction
Protein folding
