4MD2

Ground state of bacteriorhodopsin from Halobacterium salinarum

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Bacteriorhodopsin	polymer	248	26814.4	1	UniProt (P02945) Pfam (PF01036)	Halobacterium sp. NRC-1	BR, Bacterioopsin, BO
2	B, D, E, F, G... (A)	2,3-DI-PHYTANYL-GLYCEROL	non-polymer		653.2	18	Chemie (L2P) PubChem (17754058) PubChem (417493) PubChem (46936742) PubChem (446373) PubChem (53932567) PubChem (87094554) PubChem (88663197) PubChem (88663201) PubChem (5287700) PubChem (87572051) PubChem (12905054) PubChem (11017738) PubChem (12905061) PubChem (162951859) PubChem (166638144) PubChem (168974727) PubChem (166638149) PubChem (169744378)
3	C (A)	(6E,10E,14E,18E)-2,6,10,15,19,23-hexamethyltetracosa-2,6,10,14,18,22-hexaene	non-polymer		410.7	1	Chemie (SQL) PubChem (24871318) PubChem (25244109) PubChem (60123235) PubChem (638072) PubChem (1105) PubChem (92034525) PubChem (5280370) PubChem (98100390) PubChem (98100391) PubChem (11975273) PubChem (15555220) PubChem (15555221) PubChem (177696489) PubChem (131954652) PubChem (140570403)
4	U (A)	RETINAL	non-polymer		284.4	1	Chemie (RET) PubChem (1070) PubChem (23254473) PubChem (177675058) PubChem (638015) PubChem (87082476) PubChem (87110449) PubChem (87110609) PubChem (88398773) PubChem (88407543) PubChem (5280490) PubChem (5353924) PubChem (5381765) PubChem (6436079) PubChem (6436082) PubChem (11426127) PubChem (12227253) PubChem (12227254) PubChem (12227256) PubChem (12227257) PubChem (12227258) PubChem (12227259) PubChem (12227269) PubChem (12227270) PubChem (12227271) PubChem (134688327) PubChem (140510408) PubChem (145826762) PubChem (169423542) PubChem (172878320)
5	V (A)	water	water		18.0	50	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	26814.4
Non-Polymers*	Number of molecules	20
	Total formula weight	12452.0
All*	Total formula weight	39266.4

*Water molecules are not included.