1LNT

Crystal Structure of the Highly Conserved RNA Internal Loop of SRP

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	5'-R(*GP*CP*GP*UP*CP*AP*GP*GP*UP*CP*(CBV)P*G)-3'	polymer	12	3922.2	1
2	B (B)	5'-R(*CP*GP*GP*AP*AP*GP*CP*AP*GP*(CBV)P*GP*C)-3'	polymer	12	3968.3	1
3	C, D, E, H (A, B)	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
4	F, G, I (A, B)	CALCIUM ION	non-polymer		40.1	3	Chemie (CA)
5	J, K (A, B)	water	water		18.0	107	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	7890.5
Non-Polymers*	Number of molecules	7
	Total formula weight	217.5
All*	Total formula weight	8108.0

*Water molecules are not included.