1NAB

The crystal structure of the complex between a disaccharide anthracycline and the DNA hexamer d(CGATCG) reveals two different binding sites involving two DNA duplexes

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)	5'-D(*CP*GP*AP*TP*CP*G)-3'	polymer	6	1809.2	2
2	C, D (A, B)	7-[5-(4-AMINO-5-HYDROXY-6-METHYL-TETRAHYDRO-PYRAN-2-YLOXY)-4-HYDROXY-6-METHYL-TETRAHYDRO-PYRAN-2-YLOXY]-6,9,11-TRIHYDROXY-9-(2-HYDROXY-ACETYL)-7,8,9,10-TETRAHYDRO-NAPHTHACENE-5,12-DIONE	non-polymer		643.6	2	Chemie (44D)
3	E, F (A, B)	water	water		18.0	35	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	3618.4
Non-Polymers*	Number of molecules	2
	Total formula weight	1287.3
All*	Total formula weight	4905.7

*Water molecules are not included.