1. 1.13.11.11 enzyme   tryptophanase
                      tryptophan oxygenase
                      tryptophan peroxidase
                      tryptophan pyrrolase
                      L-tryptophan pyrrolase
                      tryptophan 2,3-dioxygenase
                      L-tryptophan:oxygen 2,3-oxidoreductase (decyclizing)
                      indolamine 2,3-dioxygenase
                      indoleamine 2,3-dioxygenase
                      tryptamine 2,3-dioxygenase

2. 1.13.11.26 enzyme   tryptophan pyrrolooxygenase
                      peptidyltryptophan 2,3-dioxygenase
                      peptide-tryptophan 2,3-dioxygenase
                      peptide-tryptophan:oxygen 2,3-oxidoreductase (decyclizing)
                      pyrrolooxygenase

3. 1.13.11.52 enzyme   tryptophan pyrrolase
                      IDO (ambiguous)
                      indoleamine 2,3-dioxygenase

4. 1.13.12.3 enzyme   tryptophan 2-monooxygenase
                      L-tryptophan:oxygen 2-oxidoreductase (decarboxylating)

5. 1.13.99.3 enzyme   tryptophan 2'-dioxygenase
                      tryptophan side chain oxidase
                      tryptophan side-chain oxidase
                      tryptophan side chain oxidase II
                      tryptophan side chain oxidase type I
                      tryptophan side-chain alpha,beta-oxidase
                      L-tryptophan:oxygen 2'-oxidoreductase (side-chain-cleaving)
                      TSO
                      TSO I
                      TSO II
                      indole-3-alkane alpha-hydroxylase
                      indolyl-3-alkan alpha-hydroxylase

6. 1.14.16.4 enzyme   tryptophan hydroxylase
                      L-tryptophan hydroxylase
                      tryptophan 5-hydroxylase
                      tryptophan 5-monooxygenase
                      L-tryptophan,tetrahydrobiopterin:oxygen oxidoreductase (5-hydroxylating)
                      indoleacetic acid-5-hydroxylase

7. 1.3.3.10 enzyme   tryptophan alpha,beta-oxidase
                      L-tryptophan 2',3'-oxidase
                      L-tryptophan alpha,beta-dehydrogenase
                      L-tryptophan:oxygen alpha,beta-oxidoreductase

8. 1.4.1.19 enzyme   tryptophan dehydrogenase
                      L-tryptophan dehydrogenase
                      NAD(P)-L-tryptophan dehydrogenase
                      L-tryptophan:NAD(P)+ oxidoreductase (deaminating)
                      TDH
                      L-Trp-dehydrogenase

9. 2.1.1.106 enzyme   tryptophan 2-methyltransferase
                      tryptophan 2-C-methyltransferase
                      S-adenosylmethionine:tryptophan 2-methyltransferase
                      S-adenosyl-L-methionine:L-tryptophan 2-C-methyltransferase

10. 2.3.1.112 enzyme   D-tryptophan N-malonyltransferase
                      malonyl-CoA:D-tryptophan N-malonyltransferase

11. 2.3.1.34 enzyme   D-tryptophan acetyltransferase
                      D-tryptophan N-acetyltransferase
                      acetyl-CoA:D-tryptophan N-acetyltransferase
                      acetyl-CoA-D-tryptophan-alpha-N-acetyltransferase

12. 2.5.1.34 enzyme   dimethylallyltryptophan synthetase
                      tryptophan dimethylallyltransferase
                      dimethylallylpyrophosphate:L-tryptophan dimethylallyltransferase
                      dimethylallylpyrophosphate:tryptophan dimethylallyl transferase
                      dimethylallyl-diphosphate:L-tryptophan dimethylallyltransferase
                      4-(gamma,gamma-dimethylallyl)tryptophan synthase
                      DMAT synthetase

13. 2.6.1.27 enzyme   hydroxytryptophan aminotransferase
                      tryptophan aminotransferase
                      tryptophan transaminase
                      L-tryptophan aminotransferase
                      L-tryptophan transaminase
                      5-hydroxytryptophan-ketoglutaric transaminase
                      L-tryptophan:2-oxoglutarate aminotransferase
                      L-phenylalanine-2-oxoglutarate aminotransferase

14. 3.4.11.17 enzyme   tryptophan aminopeptidase
                      tryptophanyl aminopeptidase
                      L-tryptophan aminopeptidase

15. 3.5.1.57 enzyme   tryptophanamidase
                      tryptophan aminopeptidase
                      L-tryptophan aminopeptidase
                      L-tryptophanamide amidohydrolase

16. 4.1.1.28 enzyme   hydroxytryptophan decarboxylase
                      tryptophan decarboxylase
                      5-hydroxytryptophan decarboxylase
                      DOPA decarboxylase
                      L-DOPA decarboxylase
                      aromatic amino acid decarboxylase
                      aromatic-L-amino-acid decarboxylase
                      aromatic-L-amino-acid carboxy-lyase

17. 4.2.1.20 enzyme   tryptophan desmolase
                      tryptophan synthase
                      tryptophan synthetase
                      L-tryptophan synthetase
                      indoleglycerol phosphate aldolase
                      L-serine hydro-lyase (adding indoleglycerol-phosphate)

18. 6.1.1.2 enzyme   tryptophan translase
                      tryptophan-tRNA ligase
                      tryptophanyl ribonucleic synthetase
                      tryptophanyl-tRNA synthase
                      tryptophanyl-tRNA synthetase
                      tryptophanyl-transfer RNA synthetase
                      tryptophanyl-transfer ribonucleate synthetase
                      tryptophanyl-transfer ribonucleic synthetase
                      tryptophanyl-transfer ribonucleic acid synthetase
                      L-tryptophan-tRNA(Trp) ligase (AMP-forming)
                      L-tryptophan:tRNA(Trp) ligase (AMP-forming)
                      TrpRS

19. 2.6.1.28 enzyme   tryptophan-phenylpyruvate transaminase
                      L-tryptophan:phenylpyruvate aminotransferase
                      L-tryptophan-alpha-ketoisocaproate aminotransferase

20. 4.1.99.1 enzyme   tryptophanase
                      L-tryptophanase
                      L-tryptophan indole-lyase (deaminating)