3R3K

Crystal structure of a parallel 6-helix coiled coil

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	CChex-Phi22 helix	polymer	34	3477.9	3
2	A, C	CHLORIDE ION	non-polymer		35.5	2	Chemie (CL)
3	B, C	SODIUM ION	non-polymer		23.0	4	Chemie (NA)
4	B, C	1,2-ETHANEDIOL	non-polymer		62.1	2	Chemie (EDO)
5		water	water		18.0	71	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	10433.7
Non-Polymers*	Number of molecules	8
	Total formula weight	287.0
All*	Total formula weight	10720.7

*Water molecules are not included.