464D

DISORDER AND TWIN REFINEMENT OF RNA HEPTAMER DOUBLE HELIX

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	RNA (5'-R(*UP*AP*GP*CP*UP*CP*C)-3')	polymer	7	2157.3	2
2	B, D	RNA (5'-R(*GP*GP*GP*GP*CP*(IU)P*A)-3')	polymer	7	2402.3	2
3	B	STRONTIUM ION	non-polymer		87.6	1	Chemie (SR)
4	B	SODIUM ION	non-polymer		23.0	1	Chemie (NA)
5		water	water		18.0	155	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	9119.3
Non-Polymers*	Number of molecules	2
	Total formula weight	110.6
All*	Total formula weight	9229.9

*Water molecules are not included.