4CUL

Structure of bovine endothelial nitric oxide synthase heme domain in complex with 6-acetyl-2-amino-7,7-dimethyl-7,8-dihydropteridin-4(3H)-one

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	NITRIC OXIDE SYNTHASE, ENDOTHELIAL	polymer	443	49673.0	2	UniProt (P29473) Pfam (PF02898)	BOS TAURUS (CATTLE)	CONSTITUTIVE NOS, CNOS, EC-NOS, ENDOTHELIAL NOS, ENOS, NOS TYPE III, NOSIII
2	C, G (A, B)	ARGININE	non-polymer		175.2	2	Chemie (ARG)
3	D, H (A, B)	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	2	Chemie (HEM)
4	E, I (A, B)	6-acetyl-2-amino-7,7-dimethyl-7,8-dihydropteridin-4(3H)-one	non-polymer		235.2	2	Chemie (WSD)
5	F, J (A, B)	ACETATE ION	non-polymer		59.0	2	Chemie (ACT)
6	K, L (A, B)	water	water		18.0	279	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	99345.9
Non-Polymers*	Number of molecules	8
	Total formula weight	2172.0
All*	Total formula weight	101517.9

*Water molecules are not included.