2O0C

Crystal structure of the H-NOX domain from Nostoc sp. PCC 7120 complexed to NO

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Alr2278 protein	polymer	189	21213.6	2	UniProt (Q8YUQ7) Pfam (PF07700) In PDB	Nostoc sp.
2	A, B	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	2	Chemie (HEM)
3	A, B	NITRIC OXIDE	non-polymer		30.0	2	Chemie (NO)
4		water	water		18.0	64	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	42427.3
Non-Polymers*	Number of molecules	4
	Total formula weight	1293.0
All*	Total formula weight	43720.3

*Water molecules are not included.