The Tryptophan Load Test as an Index of Vitamin B-6 Nutrition

  • R. R. Brown


The amino acid tryptophan was first isolated as the chromogenic substance in tryptic digests of proteins (1). Since that time, naturally occurring L-tryptophan has been shown to be one of the indispensable amino acids having a number of important biological functions.


Load Test Kynurenic Acid Kynurenine Pathway Pyridoxal Phosphate Tryptophan Metabolism 
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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • R. R. Brown
    • 1
  1. 1.Department of Human Oncology Wisconsin Clinical Cancer CenterUniversity of Wisconsin Center for Health SciencesMadisonUSA

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