Table 1.
Selected protein kinases, their class, the number of known protein substrates and the instances recorded in Phospho.ELM.
| Kinase | Type | Substrates | Instances |
| CK2 | Ser/Thr kinase | 54 | 138 |
| PKA | Ser/Thr kinase | 88 | 170 |
| PDKI | Ser/Thr kinase | 12 | 17 |
| Src | non-receptor Tyr Kinase | 40 | 69 |
| Abl | non-receptor Tyr Kinase | 14 | 21 |
| FAK | non-receptor Tyr Kinase | 7 | 11 |
| IR | receptor Tyr Kinase | 11 | 36 |
| EGFR | receptor Tyr Kinase | 19 | 43 |