1EQ8

THREE-DIMENSIONAL STRUCTURE OF THE PENTAMERIC HELICAL BUNDLE OF THE ACETYLCHOLINE RECEPTOR M2 TRANSMEMBRANE SEGMENT

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, E	ACETYLCHOLINE RECEPTOR PROTEIN	polymer	23	2522.0	5	UniProt (P02718) In PDB	Torpedo californica (Pacific electric ray)	ACHR M2
2	E	HYDROXIDE ION	non-polymer		17.0	1	Chemie (OH)

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	12610.1
Non-Polymers*	Number of molecules	1
	Total formula weight	17.0
All*	Total formula weight	12627.1

*Water molecules are not included.