Table 3. Processed resources for kinase–substrate interactions.

Database	Type	Interactions	Kinases	Substrates	PMID
ARCHS4	Co-expression	9936	517	3824	29636450
BIND	Literature PPI	2533	227	1323	12519993
Harmonizome	ML Predictions	10000	79	3635	27374120
HPRD	Literature PPI	5043	262	2159	18988627
huMAP	Mass-Spec PPI	1385	156	955	28596423
iPTMnet	Literature K–S	947	131	724	29145615
iREF	Literature PPI	26734	329	8036	18823568
KEGG	Literature PPI	2238	131	621	19880382
MINT	Literature PPI	1583	225	1065	22096227
NetworkIN	Predictions	5829	190	2006	17981841
Phospho.ELM	Literature K–S	1441	231	891	21062810
Phosphopoint	Literature K–S	1970	281	1061	18689816
PhosphositePlus	Literature K–S	6434	168	2680	22135298

ML: Machine learning; K–S: Kinase–substrate.