1XCS

structure of oligonucleotide/drug complex

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*TP*AP*CP*G)-3'	polymer	6	1809.2	2
2	C, E (A, B)	COBALT (II) ION	non-polymer		58.9	2	Chemie (CO)
3	D (A)	9-[(5-(ACETYLAMINO)-6-{[(1S,4R)-8-AMINO-4-[((2R)-6-AMINO-2-{2-[(1S)-5-AMINO-1-FORMYLPENTYL]HYDRAZINO}HEXANOYL)AMINO]-1-(4-AMINOBUTYL)-2,3-DIOXOOCTYL]AMINO}-6-OXOHEXYL)AMINO]-6-CHLORO-2-METHOXYACRIDINIUM	non-polymer		927.6	1	Chemie (A4L)
4	F (B)	BARIUM ION	non-polymer		137.3	1	Chemie (BA)
5	G, H (A, B)	water	water		18.0	44	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	3618.4
Non-Polymers*	Number of molecules	4
	Total formula weight	1182.8
All*	Total formula weight	4801.2

*Water molecules are not included.