Catecholamines and thyroxine are synthesized from tyrosine, and serotonin and melatonin from tryptophan.
Hesch, RD, Köhrle, J, Brabant, G
Rook, GA, Lowry, CA, Lightman, SL, Evans, AK, Nutt, DJ, Ruddick, JP
Flatmark, T
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