1J8G

X-ray Analysis of a RNA Tetraplex r(uggggu)4 at Ultra-High Resolution

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'-R(*UP*GP*GP*GP*GP*U)-3'	polymer	6	1948.2	4
2	E (A)	SPERMINE	non-polymer		202.3	1	Chemie (SPM)
3	F, G, J, K, N... (A, B, C, D)	STRONTIUM ION	non-polymer		87.6	8	Chemie (SR)
4	H, L, P (A, B, C)	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
5	I, M (A, B)	SODIUM ION	non-polymer		23.0	2	Chemie (NA)
6	S, T, U, V (A, B, C, D)	water	water		18.0	106	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	7792.8
Non-Polymers*	Number of molecules	14
	Total formula weight	1069.5
All*	Total formula weight	8862.3

*Water molecules are not included.