1FQ2

CRYSTAL STRUCTURE ANALYSIS OF THE POTASSIUM FORM OF B-DNA DODECAMER CGCGAATTCGCG

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	DNA (5'-D(*CP*GP*CP*GP*AP*AP*TP*TP*CP*GP*CP*G)-3')	polymer	12	3663.4	2
2	A	MAGNESIUM ION	non-polymer		24.3	1	Chemie (MG)
3	B	SPERMINE	non-polymer		202.3	1	Chemie (SPM)
4		water	water		18.0	187	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	7326.8
Non-Polymers*	Number of molecules	2
	Total formula weight	226.6
All*	Total formula weight	7553.4

*Water molecules are not included.