1JMB

CRYSTAL STRUCTURE OF FOUR-HELIX BUNDLE MODEL

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)	PROTEIN (FOUR-HELIX BUNDLE MODEL)	polymer	50	5828.8	3
2	D, F, H (A, B, C)	MANGANESE (II) ION	non-polymer		54.9	3	Chemie (MN)
3	E, G (A, B)	DIMETHYL SULFOXIDE	non-polymer		78.1	2	Chemie (DMS)
4	I, J, K (A, B, C)	water	water		18.0	31	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	17486.4
Non-Polymers*	Number of molecules	5
	Total formula weight	321.1
All*	Total formula weight	17807.5

*Water molecules are not included.