6MC2

Crystal structure of a tetrameric DNA fold-back quadruplex

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*TP*AP*AP*GP*GP*CP*G)-3')	polymer	9	2780.8	2		synthetic construct
2	A, B	MAGNESIUM ION	non-polymer		24.3	5	Chemie (MG)
3		water	water		18.0	123	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	5561.7
Non-Polymers*	Number of molecules	5
	Total formula weight	121.5
All*	Total formula weight	5683.2

*Water molecules are not included.