1KGK

Direct Observation of a Cytosine Analog that Forms Five Hydrogen Bonds to Guanosine; Guanyl G-Clamp

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(*GP*(GCK)P*GP*TP*AP*TP*AP*CP*GP*C)-3'	polymer	10	3237.2	2
2	C, E (A, B)	METHOXY-ETHOXYL	non-polymer		75.1	2	Chemie (MOE)
3	D (A)	SPERMINE (FULLY PROTONATED FORM)	non-polymer		206.4	1	Chemie (SPK)
4	F, G (A, B)	water	water		18.0	155	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	6474.4
Non-Polymers*	Number of molecules	3
	Total formula weight	356.5
All*	Total formula weight	6830.9

*Water molecules are not included.