Modifier	Substrate	Residue	Sequence	Mechanism/Effect	PMID	Interaction ID
CDK2	ID3	Ser5 View in OncoXplorer	sPVRGCYE	phosphorylation down-regulates	9372912	SIGNOR-53306
PTK2B	ID3	–		phosphorylation up-regulates quantity	25090023	SIGNOR-278496

Enzyme	Effect	Phosphosite	Effect	Target	PMID	Interaction ID
CDK2	phosphorylation up-regulates →	ID3 PSer5	phosphorylation down-regulates ⊣	ID3	9372912	SIGNOR-53306

Regulator	Mechanism/Effect	Target	SIGNOR-ID
CDK2	phosphorylation down-regulates	ID3	SIGNOR-53306
PTK2B	phosphorylation → up-regulates quantity	ID3	SIGNOR-278496