increased concentrations of aromatic amino acids : phenylalanine and tyrosine , and low concentrations of branched-chain amino acids : valine , leucine , and isoleucine were associated with a decrease of fisher 's index ( bcaa/aaa molar ratio ) from 3.0 +/- 0.5 ( normal ) to 2.0 +/- 0.5 which was of high diagnostic and prognostic significance .
C0301713
aromatic amino acids
C0031453
phenylalanine