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Amino acid and protein requirements in a preterm infant with classic phenylketonuria.
  1. D Shortland,
  2. I Smith,
  3. D E Francis,
  4. R Ersser,
  5. O H Wolff


    A preterm infant with classic phenylketonuria required rather less than 90 mg/kg of phenylalanine and between 270 and 290 mg/kg tyrosine daily to achieve a rate of weight gain of around 20 g/kg per day. Using Lofenalac as the low phenylalanine food, the intake of tyrosine, an essential amino acid for patients with phenylketonuria seemed to be limiting in respect of growth.

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