3SSF

Crystal structure of RNA:DNA dodecamer corresponding to HIV-1 polypurine tract, at 1.6 A resolution.

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	5'-R(*UP*AP*AP*AP*AP*GP*AP*AP*AP*AP*GP*G)-3'	polymer	12	3930.5	1
2	B	5'-D(*CP*CP*TP*TP*TP*TP*CP*TP*TP*TP*TP*A)-3'	polymer	12	3569.3	1
3	A, B	MAGNESIUM ION	non-polymer		24.3	3	Chemie (MG)
4		water	water		18.0	76	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	7499.8
Non-Polymers*	Number of molecules	3
	Total formula weight	72.9
All*	Total formula weight	7572.7

*Water molecules are not included.