3EJ1

CDK2/CyclinA complexed with a pyrazolopyridazine inhibitor

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	Cell division protein kinase 2	polymer	298	33976.5	2	UniProt (P24941) Pfam (PF00069) In PDB	Homo sapiens (human)	p33 protein kinase
2	B, D	Cyclin-A2	polymer	260	29867.5	2	UniProt (P20248) Pfam (PF00134) Pfam (PF02984) In PDB	Homo sapiens (human)	Cyclin-A
3	A, C	N-cyclopropyl-4-pyrazolo[1,5-b]pyridazin-3-ylpyrimidin-2-amine	non-polymer		252.3	2	Chemie (5BP)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	127688.0
Non-Polymers*	Number of molecules	2
	Total formula weight	504.6
All*	Total formula weight	128192.6

*Water molecules are not included.