1GQU

Crystal structure of an alternating A-T oligonucleotide fragment with Hoogsteen base pairing

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D (A, B, C, D)	DNA (5'(*AP*TP*AP*UP*AP*T)-3')	polymer	6	1872.1	4
2	E, F, G, H (A, B, C, D)	water	water		18.0	47	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	7488.4
All*	Total formula weight	7488.4

*Water molecules are not included.