[CITATION][C] Hypervalinemia: A defect in valine transamination

J Dancis, J Hutzler, K Tada, Y Wada, T Morikawa… - …, 1967 - publications.aap.org
The metabolism of the peripheral leucocyte has been studied in a child presenting with
mental retardation and hypervalinemia. A defect in the transamination of valine was
demonstrated. Evidence is presented that the transamination of value is dependent on an
enzyme that is specific for valine. Transamination of valine is demonstrable in placenta,
suggesting the possibility that the diagnosis may be made before birth.