1EGK

CRYSTAL STRUCTURE OF A NUCLEIC ACID FOUR-WAY JUNCTION

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(*AP*GP*GP*AP*GP*AP*GP*AP*GP*AP*UP*GP*GP*GP*UP*GP*CP*GP*AP*G)-3')	polymer	20	6645.1	2
2	B, D	10-23 DNA ENZYME	polymer	34	10260.6	2
3	A, C	MAGNESIUM ION	non-polymer		24.3	14	Chemie (MG)
4		water	water		18.0	84	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	33811.3
Non-Polymers*	Number of molecules	14
	Total formula weight	340.3
All*	Total formula weight	34151.6

*Water molecules are not included.