Statistics for release 140 (2026-01-28)
The number of reactions given here is the number of reaction quartets.
Unique reactions: 18,343
Unique reaction participants: 15,125
| Reaction participants help_outline | ||
|---|---|---|
| Type | Participants | Reactions |
| Small molecule (ChEBI) | 12,884 | 18,275 |
| Macromolecule (Rhea) | 1,977 | 3,354 |
| Polymer (Rhea) | 264 | 328 |
| Reactions by status help_outline | |
|---|---|
| Approved | 18,044 |
| Preliminary | 299 |
| Reactions by qualifier | |
|---|---|
| Chemically balanced | 18,336 |
| Transport | 1,560 |
| Linked database records | |||||
|---|---|---|---|---|---|
| Database | Data type | Origin | Unique database IDs | Links | Total reactions |
| EcoCyc | Reaction | Curated | 1,617 | 1,662 | 1,650 |
| MetaCyc | Reaction | Curated | 9,402 | 9,720 | 9,563 |
| Reactome | Reaction | Computed via ChEBI IDs | 1,423 | 1,660 | 975 |
| KEGG | Reaction | Curated | 6,992 | 7,127 | 7,087 |
| M-CSA | Reaction | Computed | 138 | 138 | 136 |
| Enzyme | EC number | Curated | 6,184 | 7,902 | 7,613 |
| PubMed | Bibliographic citation | Curated | 18,680 | 38,000 | 17,366 |
| ChEBI | Compound | Curated | 14,185 | 86,404 | 18,343 |
| GO | Enzymes | 4,431 | 4,431 | 4,429 | |