4CS1

Crystal structure of a simple duplex kink turn, HmKt-7 with 2 Mg bound.

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'-(*GP*GP*CP*GP*AP*AP*GP*AP*AP*CP*CP*GP*GP*GP *GP*AP*GP*CP*CP)-3'	polymer	19	6233.8	1		HALOARCULA MARISMORTUI
2	B, C (A)	MAGNESIUM ION	non-polymer		24.3	2	Chemie (MG)
3	D (A)	water	water		18.0	23	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	6233.8
Non-Polymers*	Number of molecules	2
	Total formula weight	48.6
All*	Total formula weight	6282.4

*Water molecules are not included.