Tryptophan's role as a vitamin precursor (Krehl et al., 1945).
Henderson
L M
LM
Department of Biochemistry, University of Minnesota, St. Paul 55108, USA.
D000818:Animals; D049673:History, 20th Century; D006801:Humans; D009525:Niacin / Q000096:biosynthesis*; D009751:Nutritional Requirements; D014364:Tryptophan / Q000378:metabolism*
D009525:Niacin; D014364:Tryptophan