4FRN

Crystal structure of the cobalamin riboswitch regulatory element

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)	Cobalamin riboswitch aptamer domain	polymer	102	32914.6	2		Marine metagenome
2	C, J (A, B)	Hydroxocobalamin	non-polymer		1345.3	2	Chemie (I2A)
3	D, E, F, G, H... (A, B)	BARIUM ION	non-polymer		137.3	12	Chemie (BA)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	65829.3
Non-Polymers*	Number of molecules	14
	Total formula weight	4338.6
All*	Total formula weight	70167.9

*Water molecules are not included.