Table 1.
Component | Number |
---|---|
Genes | 1,496 |
Transcripts* | 1,905 |
Proteins | 2,004 |
Complex-associated reactions* | 248 |
Isozyme-associated reactions* | 946 |
Intrasystem reactions | 3,311 |
Metabolic | 2,233 |
Transport† | 1,078 |
Exchange reactions† | 432 |
Compartment-specific metabolites | 2,712 |
Cytoplasm | 995 |
Extracellular space | 388 |
Mitochondrion | 383 |
Golgi apparatus | 279 |
Endoplasmic reticulum | 231 |
Lysosome | 207 |
Peroxisome | 139 |
Nucleus | 90 |
Citations | 1,587 |
Primary literature | 1,378 |
Review articles | 188 |
Textbooks | 21 |
Validated metabolic functions | 288 |
Knowledge gaps‡ | 356 |
*See Materials and Methods for definitions of transcripts, complexes, and isozymes.
†Transport reactions refer to intrasystem transport across a boundary (organellar and plasma membranes), whereas exchange reactions describe metabolite transport across the system boundary, e.g., into and out of the extracellular space from the surrounding medium.
‡Number of “dead-end” metabolites only produced or consumed.