8D5O

Crystal structure of theophylline aptamer in complex with TAL4

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)	RNA (33-MER)	polymer	33	10637.4	2		synthetic construct
2	C, D (A, B)	4-[4-(6,7-dimethoxyquinazolin-4-yl)piperazin-1-yl]butan-1-ol	non-polymer		346.4	2	Chemie (QEU)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	21274.9
Non-Polymers*	Number of molecules	2
	Total formula weight	692.8
All*	Total formula weight	21967.7

*Water molecules are not included.