purified tyrosine decarboxylase activity also decarboxylated l-dopa , 5-hydroxytryptophan , 3,4-dihydroxyphenylserine , o-tyrosine , m-tyrosine , phenylalanine , histidine , and tryptophan , which suggested that the purified enzyme was aromatic l-amino acid decarboxylase .
C0000578
5-hydroxytryptophan
C0041249
tryptophan