Using advanced instrumentation techniques in his UTSA laboratory, Liu concluded that tryptophan 2,3-dioxygenase deficiency was the explanation for the patient’s conditions: chronic hypertryptophanemia ...

This effect is linked to a diet-induced deficiency of the precursor substance tryptophan – an amino acid that must be obtained through food. Researchers from DZNE report on this in the journal ...

This effect is linked to a diet-induced deficiency of the precursor substance tryptophan – an amino acid that must be obtained through food. Researchers from DZNE report on this in the journal ...