| EC:1.1.1.27 L-lactate dehydrogenase. | TG | PF | CP | HS |
| EC:1.4.1.- | TG | PF | CP | HS |
| EC:1.8.1.6 Cystine reductase. | TG | PF | CP | HS |
| EC:1.8.1.10 CoA-glutathione reductase. | TG | PF | CP | HS |
| EC:1.8.4.3 Glutathione--CoA-glutathione transhydrogenase. | TG | PF | CP | HS |
| EC:1.8.4.4 Glutathione--cystine transhydrogenase. | TG | PF | CP | HS |
| EC:1.13.11.20 Cysteine dioxygenase. | TG | PF | CP | HS |
| EC:2.3.1.30 Serine O-acetyltransferase. | TG | PF | CP | HS |
| EC:2.5.1.47 Cysteine synthase. | TG | PF | CP | HS |
| EC:2.5.1.48 Cystathionine gamma-synthase. | TG | PF | CP | HS |
| EC:2.5.1.49 O-acetylhomoserine aminocarboxypropyltransferase. | TG | PF | CP | HS |
| EC:2.6.1.1 Aspartate transaminase. | TG | PF | CP | HS |
| EC:2.6.1.3 Cysteine transaminase. | TG | PF | CP | HS |
| EC:2.8.1.2 3-mercaptopyruvate sulfurtransferase. | TG | PF | CP | HS |
| EC:2.8.2.- | TG | PF | CP | HS |
| EC:4.1.1.12 Aspartate 4-decarboxylase. | TG | PF | CP | HS |
| EC:4.3.1.17 L-serine ammonia-lyase. | TG | PF | CP | HS |
| EC:4.4.1.1 Cystathionine gamma-lyase. | TG | PF | CP | HS |
| EC:4.4.1.8 Cystathionine beta-lyase. | TG | PF | CP | HS |
| EC:4.4.1.10 Cysteine lyase. | TG | PF | CP | HS |
| EC:4.4.1.15 D-cysteine desulfhydrase. | TG | PF | CP | HS |
| EC:5.1.1.10 Amino-acid racemase. | TG | PF | CP | HS |
| EC:6.1.1.16 Cysteine--tRNA ligase. | TG | PF | CP | HS |