Phenylalanine to Tyrosine Ratio Measurement

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the ratio of phenylalanine compared to tyrosine present in a sample. The measurement may be expressed as a ratio or percentage.

**Synonyms:** - PHETYR - Phenylalanine/Tyrosine - Phenylalanine/Tyrosine - Phenylalanine/Tyrosine Ratio Measurement