1. 1.13.12.1 enzyme   arginine decarboxylase
                      arginine monooxygenase
                      arginine 2-monooxygenase
                      arginine decarboxy-oxidase
                      arginine oxygenase (decarboxylating)
                      L-arginine:oxygen 2-oxidoreductase (decarboxylating)

2. 2.3.1.109 enzyme   arginine succinyltransferase
                      arginine N-succinyltransferase
                      succinyl-CoA:L-arginine N2-succinyltransferase

3. 2.3.2.8 enzyme   arginine transferase
                      arginyltransferase
                      arginyl-tRNA protein transferase
                      L-arginyl-tRNA:protein arginyltransferase
                      arginyl-transfer ribonucleate-protein aminoacyltransferase
                      arginyl-transfer ribonucleate-protein transferase

4. 2.7.3.3 enzyme   arginine kinase
                      arginine phosphokinase
                      ATP:L-arginine N-phosphotransferase
                      adenosine 5'-triphosphate-arginine phosphotransferase
                      adenosine 5'-triphosphate: L-arginine phosphotransferase

5. 3.4.11.6 enzyme   arginine aminopeptidase
                      L-arginine aminopeptidase
                      Cl--activated arginine aminopeptidase
                      aminopeptidase B
                      arginyl aminopeptidase
                      arylamidase II
                      cytosol aminopeptidase IV

6. 3.4.17.20 enzyme   arginine carboxypeptidase
                      carboxypeptidase R
                      carboxypeptidase U
                      thrombin-activatable fibrinolysis inhibitor
                      plasma carboxypeptidase B (misleading, since the term  carboxypeptidase B is used for other enzymes)

7. 3.4.17.3 enzyme   arginine carboxypeptidase
                      peptidyl-L-lysine(-L-arginine) hydrolase
                      CPN
                      bradykinase
                      protaminase
                      CPase N
                      anaphylatoxin inactivator
                      carboxypeptidase N
                      hippuryllysine hydrolase
                      kininase I
                      kininase Ia
                      lysine carboxypeptidase
                      bradykinin-decomposing enzyme
                      creatinine kinase convertase
                      plasma carboxypeptidase B
                      creatine kinase conversion factor

8. 3.5.3.1 enzyme   arginine amidinase
                      arginine transamidinase
                      L-arginine amidinohydrolase
                      arginase
                      canavanase
                      L-arginase

9. 3.5.3.10 enzyme   D-arginine amidinohydrolase
                      D-arginase

10. 3.5.3.23 enzyme   arginine succinylhydrolase
                      N-succinylarginine dihydrolase
                      N2-succinylarginine dihydrolase
                      2-N-succinyl-L-arginine iminohydrolase (decarboxylating)
                      AruB
                      AstB
                      SADH

11. 3.5.3.6 enzyme   arginine deiminase
                      arginine dihydrolase
                      L-arginine deiminase
                      L-arginine iminohydrolase
                      citrulline iminase

12. 4.1.1.19 enzyme   arginine decarboxylase
                      L-arginine carboxy-lyase

13. 5.1.1.9 enzyme   arginine racemase
                      arginine racemase

14. 6.1.1.19 enzyme   arginine translase
                      arginine-tRNA ligase
                      arginine-tRNA synthetase
                      L-arginine:tRNA(Arg) ligase (AMP-forming)
                      arginyl-tRNA synthetase
                      arginyl-transfer RNA synthetase
                      arginyl-transfer ribonucleate synthetase
                      arginyl transfer ribonucleic acid synthetase

15. 2.1.1.124 enzyme   [cytochrome c]-arginine N-methyltransferase
                      S-adenosyl-L-methionine:[cytochrome c]-arginine N(omega)-methyltransferase

16. 2.1.1.125 enzyme   histone-arginine N-methyltransferase
                      S-adenosyl-L-methionine:histone-arginine N(omega)-methyltransferase
                      protein methylase I
                      histone protein methylase I
                      nuclear protein (histone) N-methyltransferase

17. 2.1.4.1 enzyme   arginine-glycine amidinotransferase
                      arginine-glycine transamidinase
                      L-arginine:glycine amidinotransferase
                      glycine amidinotransferase
                      glycine transamidinase

18. 2.1.4.2 enzyme   L-arginine:inosamine phosphate amidinotransferase
                      L-arginine:inosamine-P-amidinotransferase
                      L-arginine:1-amino-1-deoxy-scyllo-inositol-4-phosphate amidinotransferase
                      inosamine-P amidinotransferase
                      inosamine-phosphate amidinotransferase
                      scyllo-inosamine-4-phosphate amidinotransferase

19. 2.5.1.66 enzyme   N2-(2-carboxyethyl)arginine synthase
                      N2-(2-carboxyethyl)arginine synthetase
                      glyceraldhyde-3-phosphate:L-arginine N2-(2-hydroxy-3-oxopropyl) transferase (2-carboxyethyl-forming)
                      CEAS
                      CEA synthetase

20. 3.4.22.37 enzyme   arginine-specific gingipain
                      arginine-specific gingivain
                      arginine-specific cysteine protease
                      RGP
                      argingipain
                      Arg-gingipain
                      RGP-1
                      gingipain R
                      gingipain-1
                      Arg-gingivain-55 proteinase
                      Arg-gingivain-70 proteinase
                      Arg-gingivain-75 proteinase

21. 3.4.24.61 enzyme   N-arginine dibasic convertase
                      nardilysin
                      NRD-convertase

22. 3.5.1.72 enzyme   benzoyl-D-arginine arylamidase
                      D-benzoylarginine-4-nitroanilide amidase
                      N-benzoyl-D-arginine-4-nitroanilide amidohydrolase
                      D-BAPA-ase

23. 3.5.3.15 enzyme   peptidylarginine deiminase
                      protein-arginine deiminase
                      protein-L-arginine iminohydrolase

24. 3.5.3.18 enzyme   dimethylarginine dimethylaminohydrolase
                      N(G),N(G)-dimethylarginine dimethylaminohydrolase
                      N(G),N(G)-dimethyl-L-arginine dimethylamidohydrolase
                      dimethylargininase

25. 4.3.2.1 enzyme   arginine-succinate lyase
                      N-(L-argininosuccinate) arginine-lyase
                      arginosuccinase
                      argininosuccinate lyase
                      argininosuccinic acid lyase

26. 6.3.2.24 enzyme   tyrosine-arginine ligase
                      tyrosyl-arginine synthase
                      L-tyrosine:L-arginine ligase (AMP-forming)
                      kyotorphin synthase
                      kyotorphin synthetase
                      kyotorphin-synthesizing enzyme

27. 6.3.4.5 enzyme   arginine succinate synthetase
                      argininosuccinate synthase
                      argininosuccinate synthetase
                      arginosuccinate synthetase
                      argininosuccinic acid synthetase
                      citrulline-aspartate ligase
                      L-citrulline:L-aspartate ligase (AMP-forming)

28. 2.4.2.31 enzyme   NAD(P)+-arginine ADP-ribosyltransferase
                      NAD(P)-arginine ADP-ribosyltransferase
                      NAD(P)+-protein-arginine ADP-ribosyltransferase
                      NAD:L-arginine ADP-D-ribosyltransferase
                      NAD(P)+:L-arginine ADP-D-ribosyltransferase
                      ADP-ribosyltransferase
                      mono(ADP-ribosyl)transferase

29. 3.4.17.10 enzyme   peptidyl-L-lysine(-L-arginine) hydrolase
                      carboxypeptidase E
                      carboxypeptidase H
                      enkephalin convertase
                      enkephalin precursor carboxypeptidase
                      enkephalin-precursor endopeptidase
                      membrane-bound carboxypeptidase
                      insulin granule-associated carboxypeptidase
                      cobalt-stimulated chromaffin granule carboxypeptidase

30. 3.4.17.2 enzyme   peptidyl-L-lysine [L-arginine]hydrolase
                      protaminase
                      carboxypeptidase B
                      pancreatic carboxypeptidase B
                      tissue carboxypeptidase B

31. 2.1.1.126 enzyme   [myelin basic protein]-arginine N-methyltransferase
                      S-adenosyl-L-methionine:[myelin-basic-protein]-arginine N(omega)-methyltransferase
                      protein methylase I
                      myelin basic protein methylase I

32. 3.2.2.19 enzyme   ADP-ribosylarginine hydrolase
                      [protein ADP-ribosylarginine] hydrolase
                      ADP-ribose-L-arginine cleavage enzyme
                      N(omega)-(ADP-D-ribosyl)-L-arginine ADP-ribosylhydrolase
                      protein-N(omega)-(ADP-D-ribosyl)-L-arginine ADP-ribosylhydrolase

33. 6.3.3.4 enzyme   (carboxyethyl)arginine beta-lactam-synthase
                      L-N2-(2-carboxyethyl)arginine cyclo-ligase (AMP-forming)

34. 1.5.1.11 enzyme   N2-(D-1-carboxyethyl)-L-arginine:NAD+ oxidoreductase (L-arginine-forming)
                      ODH
                      octopine dehydrogenase
                      D-octopine dehydrogenase
                      D-octopine synthase
                      octopine:NAD oxidoreductase

35. 1.5.1.19 enzyme   N2-(D-1,3-dicarboxypropyl)-L-arginine:NADP+ oxidoreductase (L-arginine-forming)
                      NOS
                      nopaline dehydrogenase
                      nopaline synthase
                      D-nopaline dehydrogenase
                      D-nopaline synthase

36. 1.14.13.39 enzyme   L-arginine,NADPH:oxygen oxidoreductase (nitric-oxide-forming)
                      NADPH-diaphorase
                      NO synthase
                      nitric oxide synthetase
                      nitric-oxide synthase
                      endothelium-derived relaxing factor synthase
                      endothelium-derived relaxation factor-forming enzyme