title: THE FREE TRYPTOPHANE CONTENT OF HUMAN URINE.
abstract: The amount of 1-tryptophane excreted per day by 9 different normal male subjects was determined by a microbiological method with L. arabinosus as the test organism. From 12-30 mg per day were excreted as contrasted to an average value of 281 mg per day reported by Albanese and Frankston. A negligible amount of indole in the urine could be demonstrated. Satisfactory values and recoveries of 1-tryptophane were obtained at different levels of the test sample.
authors.forename: B S
authors.initials: BS
authors.lastname: Schweigert
authors.forename: H E
authors.initials: HE
authors.lastname: Sauberlich
authors.forename: C A
authors.initials: CA
authors.lastname: Elvehjem