4R44

Racemic crystal structure of a tetramolecular DNA G-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, C, D, E...	5'-D(*TP*GP*GP*GP*GP*T)-3'	polymer	6	1880.3	16		synthetic construct
2	M, N, P, A, D...	POTASSIUM ION	non-polymer		39.1	14	Chemie (K)
3	K, N, O, P	SODIUM ION	non-polymer		23.0	4	Chemie (NA)
4		water	water		18.0	1	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	16
	Total formula weight	30084.0
Non-Polymers*	Number of molecules	18
	Total formula weight	639.3
All*	Total formula weight	30723.3

*Water molecules are not included.