| MMDBr0013270 | L-Cystathionine | L-Homocysteine | L-alanine/L-glutamate racemase | Non-hydrolytic bond cleavage (or its reversal); Racemization | RHEA | 34755880 |
| MMDBr0013274 | L-Homoserine | O-Phosphohomoserine | Homoserine kinase | Phosphorylation | RHEA | 34755880 |
| MMDBr0013459 | L-Homoserine | L-Aspartate-semialdehyde | Bifunctional aspartokinase/homoserine dehydrogenase 1 | Dehydrogenation | RHEA | 34755880 |
| MMDBr0013460 | L-Homoserine | L-Aspartate-semialdehyde | Bifunctional aspartokinase/homoserine dehydrogenase 1 | Dehydrogenation | RHEA | 34755880 |
| MMDBr0013500 | D-Fructose | Fructose 6-phosphate | Hexokinase | Phosphorylation | RHEA | 34755880 |
| MMDBr0013886 | Carbamoylphosphate | Citrulline | Ornithine carbamoyltransferase | Transfer of a carbamoyl group | RHEA | 34755880 |
| MMDBr0014229 | 5-Amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate | (2S)-2-[5-Amino-1-(5-phospho-beta-D-ribosyl)imidazole-4-carboxamido]succinic acid | Phosphoribosylaminoimidazole-succinocarboxamide synthase | Synthesis | RHEA | 34755880 |
| MMDBr0014954 | L-Dihydroorotic acid | orotate | Dihydroorotate dehydrogenase (fumarate) | Dehydrogenation | RHEA | 34755880 |
| MMDBr0017874 | L-Glutamine | L-Glutamic acid | Thermolabile glutaminase | Synthesis | RHEA | 34755880 |
| MMDBr0017879 | L-Glutamine | 2-formamido-N(1)-(5-O-phospho-beta-D-ribosyl)acetamidine | Phosphoribosylformylglycinamidine synthase | Synthesis | RHEA | 34755880 |
| MMDBr0024460 | S-Adenosylmethionine | S-Adenosylhomocysteine | Type II methyltransferase M.MthTI | Methylation | RHEA | 34755880 |
| MMDBr0024497 | S-Adenosylmethionine | S-Adenosylhomocysteine | Type I restriction enzyme MjaVII methylase subunit | Methylation | RHEA | 34755880 |
| MMDBr0024751 | lipid II(3−) | di-trans,octa-cis-undecaprenyl diphosphate | Penicillin-binding protein 2a | Glycan chain elongation | RHEA | 34755880 |
| MMDBr0024757 | L-Histidine | Pyruvic acid | Phosphoenolpyruvate-protein phosphotransferase | Transfer of phosphate group | RHEA | 34755880 |
