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Clinical Chemistry, Vol 34, 2092-2095, Copyright © 1988 by American Association for Clinical Chemistry
PR Parvy, JI Bardet, DM Rabier and PP Kamoun
Laboratoire de Biochimie Medicale B, Hopital Necker-Enfants Malades, Paris, France.
We determined age-related reference values for urinary free amino acids (in mmol/mol creatinine) in first morning urine specimens from 360 control subjects who were divided into nine age groups: birth to 1 month, 1-6 months, 6-12 months, 1-2 years, 2-4 years, 4-7 years, 7-10 years, 10-13 years, and older than 13 years. Except for taurine and 3- methylhistidine, the concentration of all the amino acids decreased with increasing age. The use of these results to detect aminoacidopathies and tubulopathies is discussed.
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