4U92

Crystal structure of a DNA/Ba2+ G-quadruplex containing a water-mediated C-tetrad

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*CP*AP*KP*GP*CP*GP*TP*GP*G)-3')	polymer	10	2793.9	2		synthetic construct
2	A, B	BARIUM ION	non-polymer		137.3	6	Chemie (BA)
3	A	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
4		water	water		18.0	61	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	5587.7
Non-Polymers*	Number of molecules	8
	Total formula weight	872.6
All*	Total formula weight	6460.3

*Water molecules are not included.