2HOK

Crystal structure of an E. coli thi-box riboswitch bound to thiamine pyrophosphate, calcium ions

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	thi-box riboswitch	polymer	83	26798.9	1
2	A	CALCIUM ION	non-polymer		40.1	7	Chemie (CA)
3	A	THIAMINE DIPHOSPHATE	non-polymer		425.3	1	Chemie (TPP)
4		water	water		18.0	1	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	26798.9
Non-Polymers*	Number of molecules	8
	Total formula weight	705.9
All*	Total formula weight	27504.8

*Water molecules are not included.