| EC:1.8.1.2 Sulfite reductase (NADPH). | TG | PF | CP | HS |
| EC:1.8.2.1 Sulfite dehydrogenase. | TG | PF | CP | HS |
| EC:1.8.3.1 Sulfite oxidase. | TG | PF | CP | HS |
| EC:1.8.4.8 Phosphoadenylyl-sulfate reductase (thioredoxin). | TG | PF | CP | HS |
| EC:1.8.7.1 Sulfite reductase (ferredoxin). | TG | PF | CP | HS |
| EC:1.8.99.1 Sulfite reductase. | TG | PF | CP | HS |
| EC:1.8.99.2 Adenylylsulfate reductase. | TG | PF | CP | HS |
| EC:1.13.11.18 Sulfur dioxygenase. | TG | PF | CP | HS |
| EC:1.13.99.- | TG | PF | CP | HS |
| EC:2.3.1.30 Serine O-acetyltransferase. | TG | PF | CP | HS |
| EC:2.3.1.31 Homoserine O-acetyltransferase. | TG | PF | CP | HS |
| EC:2.3.1.46 Homoserine O-succinyltransferase. | 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:2.7.1.25 Adenylylsulfate kinase. | TG | PF | CP | HS |
| EC:2.7.7.4 Sulfate adenylyltransferase. | TG | PF | CP | HS |
| EC:2.7.7.5 Sulfate adenylyltransferase (ADP). | TG | PF | CP | HS |
| EC:2.8.1.5 Thiosulfate--dithiol sulfurtransferase. | TG | PF | CP | HS |
| EC:2.8.2.1 Aryl sulfotransferase. | TG | PF | CP | HS |
| EC:2.8.2.2 Alcohol sulfotransferase. | TG | PF | CP | HS |
| EC:2.8.2.3 Arylamine sulfotransferase. | TG | PF | CP | HS |
| EC:2.8.2.4 Estrone sulfotransferase. | TG | PF | CP | HS |
| EC:2.8.2.5 Chondroitin 4-sulfotransferase. | TG | PF | CP | HS |
| EC:2.8.2.6 Choline sulfotransferase. | TG | PF | CP | HS |
| EC:3.1.3.7 3'(2'),5'-bisphosphate nucleotidase. | TG | PF | CP | HS |
| EC:3.6.2.1 Adenylylsulfatase. | TG | PF | CP | HS |
| EC:3.6.2.2 Phosphoadenylylsulfatase. | TG | PF | CP | HS |
| EC:3.12.1.1 Trithionate hydrolase. | TG | PF | CP | HS |
| EC:4.4.1.2 Homocysteine desulfhydrase. | TG | PF | CP | HS |
| EC:4.4.1.8 Cystathionine beta-lyase. | TG | PF | CP | HS |