@misc{indiciae11de74d9d179,
  title = {Using studies on tryptophan metabolism to answer basic biological questions.},
  author = {Charles Yanofsky},
  year = {2003},
  doi = {10.1074/jbc.x200012200},
  url = {https://pubmed.ncbi.nlm.nih.gov/12556463/},
  note = {Source identifier: 12556463}
}