5VPW

Nitrogenase Cp1 at pH 5

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	Nitrogenase molybdenum-iron protein alpha chain	polymer	520	57870.9	2	UniProt (P00467) Pfam (PF00148) In PDB	Clostridium pasteurianum	Dinitrogenase,Nitrogenase component I
2	B, D	Nitrogenase molybdenum-iron protein beta chain	polymer	458	50175.1	2	UniProt (P11347) Pfam (PF00148) In PDB	Clostridium pasteurianum	Dinitrogenase,Nitrogenase component I
3	A, C	3-HYDROXY-3-CARBOXY-ADIPIC ACID	non-polymer		206.2	2	Chemie (HCA)
4	A, C	iron-sulfur-molybdenum cluster with interstitial carbon	non-polymer		787.5	2	Chemie (ICS)
5	A, C	FE(8)-S(7) CLUSTER	non-polymer		671.2	2	Chemie (CLF)
6	B	FE (II) ION	non-polymer		55.8	2	Chemie (FE2)
7		water	water		18.0	527	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	216092.1
Non-Polymers*	Number of molecules	8
	Total formula weight	3441.3
All*	Total formula weight	219533.4

*Water molecules are not included.