4L81

Structure of the SAM-I/IV riboswitch (env87(deltaU92, deltaG93))

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	SAM-I/IV variant riboswitch aptamer domain	polymer	96	31253.8	1
2	B (A)	S-ADENOSYLMETHIONINE	non-polymer		398.4	1	Chemie (SAM)
3	C, D, E, F, G... (A)	COBALT HEXAMMINE(III)	non-polymer		161.1	9	Chemie (NCO)
4	L, M, N, O, P... (A)	MAGNESIUM ION	non-polymer		24.3	6	Chemie (MG)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	31253.8
Non-Polymers*	Number of molecules	16
	Total formula weight	1994.3
All*	Total formula weight	33248.1

*Water molecules are not included.