| parent | Tryptophan | LP15931-6 |
| child | Tryptophan [Moles/volume] in 24 hour Urine | 9325-2 |
| child | Tryptophan [Moles/time] in 24 hour Urine | 25546-3 |
| child | Tryptophan [Mass/volume] in Urine | 3072-6 |
| child | Tryptophan [Presence] in Urine | 17752-7 |
| child | Tryptophan [Moles/volume] in Urine | 34384-8 |
| child | Tryptophan/Creatinine [Mass Ratio] in 24 hour Urine | 44414-1 |
| child | Tryptophan/Creatinine [Ratio] in 24 hour Urine | 56993-9 |
| child | Tryptophan/Creatinine [Molar ratio] in 24 hour Urine | 25994-5 |
| child | Tryptophan/Creatinine [Mass Ratio] in Urine | 13817-2 |
| child | Tryptophan/Creatinine [Ratio] in Urine | 28608-8 |
| child | Tryptophan/Creatinine [Molar ratio] in Urine | 25139-7 |
| PartDisplayName | en-US | Tryptophan | Urine | Chemistry - non-challenge |
LOINC Version: 2.77
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