1BCF

THE STRUCTURE OF A UNIQUE, TWO-FOLD SYMMETRIC, HAEM-BINDING SITE

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D, E...	BACTERIOFERRITIN	polymer	158	18518.0	12	UniProt (P0ABD3) Pfam (PF00210) In PDB	Escherichia coli
2	F, G, H, I, J...	MANGANESE (II) ION	non-polymer		54.9	24	Chemie (MN)
3	G, I, K, A, C...	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	6	Chemie (HEM)

Contents of the asymmetric unit

Polymers	Number of chains	12
	Total formula weight	222216.2
Non-Polymers*	Number of molecules	30
	Total formula weight	5017.4
All*	Total formula weight	227233.6

*Water molecules are not included.