3GNK

Calcium bound to the Holliday junction sequence d(TCGGCGCCGA)4

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 (A, B, C, D)	5'-D(*TP*CP*GP*GP*CP*GP*CP*CP*GP*A)-3'	polymer	10	3046.0	4
2	E, H (A, D)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
3	F, G (B, D)	SODIUM ION	non-polymer		23.0	2	Chemie (NA)
4	I, J, K, L (A, B, C, D)	water	water		18.0	183	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	12184.0
Non-Polymers*	Number of molecules	4
	Total formula weight	126.1
All*	Total formula weight	12310.1

*Water molecules are not included.