6N4G

Crystal structure of a tetrameric DNA fold-back quadruplex

Replaces:  6MC5

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	DNA (5'-D(*CP*GP*TP*TP*AP*GP*GP*CP*G)-3')	polymer	9	2771.8	2		synthetic construct
2	C, D, E, F, G... (A, B)	BARIUM ION	non-polymer		137.3	9	Chemie (BA)
3	L, M (A, B)	water	water		18.0	136	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	5543.6
Non-Polymers*	Number of molecules	9
	Total formula weight	1235.9
All*	Total formula weight	6779.6

*Water molecules are not included.