224D

DNA-DRUG REFINEMENT: A COMPARISON OF THE PROGRAMS NUCLSQ, PROLSQ, SHELXL93 AND X-PLOR, USING THE LOW TEMPERATURE D(TGATCA)-NOGALAMYCIN STRUCTURE

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)	DNA (5'-D(*TP*GP*AP*TP*CP*A)-3')	polymer	6	1808.2	2
2	C, D (A, B)	NOGALAMYCIN	non-polymer		787.8	2	Chemie (NGM)
3	E, F (A, B)	water	water		18.0	77	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	3616.5
Non-Polymers*	Number of molecules	2
	Total formula weight	1575.6
All*	Total formula weight	5192.1

*Water molecules are not included.