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A 6-month-old infant is seen in the emergency room with a fractured rib and subdural hematoma. The child’s hair is thin, colorless and tangled. His serum copper level is 4.5 nM/L (Normal range is 5-11 nM/L). Developmental delay is apparent. Which of the following enzyme activity is most affected corresponding to the symptoms ?
a) Lysyl oxidase
b) Carboxy peptidase
c) Tyrosinase
d) Super oxide dismutase
f) Xanthine oxidase


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