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, D, E, F, G... (A, B)	BARIUM ION	non-polymer		137.3	12	Chemie (BA) PubChem (104810)
3	I, Q (A, B)	COBALAMIN	non-polymer		1330.4	2	Chemie (B12)
4	J, R (A, B)	HYDROXIDE ION	non-polymer		17.0	2	Chemie (OH) PubChem (961)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	65829.3
Non-Polymers*	Number of molecules	16
	Total formula weight	4342.7
All*	Total formula weight	70171.9

*Water molecules are not included.