| MMDBr0012895 | Orotidylic acid | Phosphoribosyl pyrophosphate | Orotate phosphoribosyltransferase | Transfer of a ribosyl group | RHEA | 34755880 |
| MMDBr0013026 | Orotidylic acid | Uridine 5'-monophosphate | Orotidine 5'-phosphate decarboxylase | Decarboxylation | RHEA | 34755880 |
| MMDBr0013083 | Glucose 1-phosphate | ADP-alpha-D-glucose | Glucose-1-phosphate adenylyltransferase | Reversible transfer of an adenylyl group | RHEA | 34755880 |
| MMDBr0013173 | Uridine 5'-monophosphate | Phosphoribosyl pyrophosphate | Bifunctional protein PyrR | Transfer of phosphoribosyl group | RHEA | 34755880 |
| MMDBr0013224 | N-acetyl-alpha-D-glucosamine 1-phosphate | Uridine diphosphate-N-acetylglucosamine | Bifunctional protein GlmU | N-Acetylation; Phosphorylation; Isomerization | RHEA | 34755880 |
| MMDBr0013225 | L-Dihydroorotic acid | orotate | Dihydroorotate dehydrogenase B (NAD(+)), catalytic subunit | Dehydrogenation | RHEA | 34755880 |
| MMDBr0013248 | alpha-D-Glucosamine 1-phosphate | N-acetyl-alpha-D-glucosamine 1-phosphate | Bifunctional protein GlmU | N-Acetylation | RHEA | 34755880 |
| MMDBr0013444 | D-Ribose-5-phosphate | Phosphoribosyl pyrophosphate | Ribose-phosphate pyrophosphokinase 1 | Phosphorylation | RHEA | 34755880 |
| MMDBr0013946 | Carbamoylphosphate | N-carbamoyl-L-aspartate | Protein pyrABCN | Transfer of a carbamoyl group | RHEA | 34755880 |
| MMDBr0014437 | L-Dihydroorotic acid | N-carbamoyl-L-aspartate | Dihydroorotase | Hydrolysis | RHEA | 34755880 |
| MMDBr0017882 | Hydrogen carbonate | Carbamoylphosphate | Carbamoyl-phosphate synthase small chain | Synthesis | RHEA | 34755880 |
