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Crystal structure of Cd2+-bound DNA aptamer

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 (A, B, C)	25-mer DNA	polymer	25	7690.9	3		synthetic construct
2	D, G, I (A, B, C)	CADMIUM ION	non-polymer		112.4	3	Chemie (CD)
3	E, F, H, J (A, B, C)	BARIUM ION	non-polymer		137.3	4	Chemie (BA)
4	K, L, M (A, B, C)	water	water		18.0	17	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	23072.8
Non-Polymers*	Number of molecules	7
	Total formula weight	886.5
All*	Total formula weight	23959.4

*Water molecules are not included.