| MMDBr0012857 | Hydrogen carbonate | Carbamoylphosphate | Carbamate kinase | Phosphorylation | RHEA | 34755880 |
| MMDBr0013851 | heme b | heme b | Cytochrome c biogenesis ATP-binding export protein CcmA | Transport | RHEA | 34755880 |
| MMDBr0013886 | Carbamoylphosphate | Citrulline | Ornithine carbamoyltransferase | Transfer of a carbamoyl group | RHEA | 34755880 |
| MMDBr0013901 | L-Arginine | Citrulline | Arginine deiminase | Hydrolysis of l-arginine to citrulline and ammonium ion | RHEA | 34755880 |
| MMDBr0014117 | N-Acetyl-L-glutamate 5-semialdehyde | N-Acetyl-L-glutamyl 5-phosphate | Protein ARG5,6, mitochondrial | Reduction | RHEA | 34755880 |
| MMDBr0024341 | S-Adenosylmethionine | 5'-Methylthioadenosine | Acyl-homoserine-lactone synthase | Synthesis | RHEA | 34755880 |
| MMDBr0024686 | Nitrogen | Hydrogen | Nitrogenase iron protein | Nitrogen fixation | RHEA | 34755880 |
| MMDBr0025789 | Glutathione | Glutathione disulfide | Peroxiredoxin | Not Available | RHEA | 34755880 |
