1SGS

Crystal structure of a free kB DNA

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	kB DNA	polymer	17	5187.4	1
2	B, C, D, E, F... (A)	CALCIUM ION	non-polymer		40.1	6	Chemie (CA)
3	H (A)	water	water		18.0	107	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	5187.4
Non-Polymers*	Number of molecules	6
	Total formula weight	240.5
All*	Total formula weight	5427.8

*Water molecules are not included.