pineal levels of tryptophan , 5-hydroxytryptophan , serotonin , n-acetylserotonin , melatonin , 5-hydroxyindoleacetic acid and the activities of the enzymes n-acetyltransferase and hydroxyindole-o-methyltransferase were determined in male albino rats and syrian hamsters that were implanted with the appropriate corticosteroid or adrenalectomized two weeks earlier .
C0041249
tryptophan
C0000578
5-hydroxytryptophan