3NPQ

Structure of the S-adenosylhomocysteine riboswitch at 2.18 A

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 (A, B, C)	S-ADENOSYLHOMOCYSTEINE RIBOSWITCH	polymer	54	17489.5	3		Ralstonia solanacearum
2	D, J, P (A, B, C)	S-ADENOSYL-L-HOMOCYSTEINE	non-polymer		384.4	3	Chemie (SAH)
3	E, F, G, H, I... (A, B, C)	COBALT HEXAMMINE(III)	non-polymer		161.1	15	Chemie (NCO)
4	V, W, X (A, B, C)	water	water		18.0	575	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	52468.5
Non-Polymers*	Number of molecules	18
	Total formula weight	3570.0
All*	Total formula weight	56038.5

*Water molecules are not included.