Table 1 Statistics on orphan reactions in KEGG and MetaCyc metabolic databases
MetaCyc | KEGG | |
|---|---|---|
Total number of non-spontaneous reactions | 10126 | 9148 |
Number of orphan reactions | 3929 | 4348 |
Number of reactions in a pathway | 6873 | 6271 |
Number of orphan reactions in a pathway | 1833 | 1716 |
Number of orphan reactions having a non orphan pathway neighbour | 915 | 1223 |
Number of pathways | 2002 | 150 |
Average number of reactions per pathway | 4 | 80 |
Number of pathways with only non orphan reactions | 1264 | 19 |
Number of pathways with only orphan reactions | 155 | 0 |