4U3L

octameric RNA duplex co-crystallized in calcium(II)chloride

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	RNA (5'-R(*UP*CP*GP*UP*AP*CP*GP*A)-3')	polymer	8	2526.6	2		synthetic construct
2	C, D, E (A, B)	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
3	F, G (A, B)	water	water		18.0	53	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	5053.1
Non-Polymers*	Number of molecules	3
	Total formula weight	120.2
All*	Total formula weight	5173.4

*Water molecules are not included.