1DDY

MOLECULAR RECOGNITION BY THE VITAMIN B12 RNA APTAMER

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, D (A, C, E, G)	VITAMIN B12 BINDING RNA	polymer	35	11280.8	4
2	E, G, I, K (A, C, E, G)	COBALAMIN	non-polymer		1330.4	4	Chemie (B12)
3	F, H, J, L (A, C, E, G)	METHYLAMINE	non-polymer		31.1	4	Chemie (NME)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	45123.3
Non-Polymers*	Number of molecules	8
	Total formula weight	5445.7
All*	Total formula weight	50568.9

*Water molecules are not included.