optical absorption and epr spectra suggest that the affinity of no for tryptophan dioxygenase increases in the order : tryptophan dioxygenase , tryptophan dioxygenase + alpha-methyltryptophan , tryptophan diogenase `` '' 5-hydroxytryptophan , tryptophan dioxygenase + l-tryptophan .
C0000578
-hydroxytryptopha
C0041249
tryptopha