4IA4

Structure of the spinach aquaporin SoPIP2;1 at pH 6

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 (A, B, C, D)	Aquaporin	polymer	281	29929.8	4	UniProt (Q41372) Pfam (PF00230)	Spinacia oleracea (Spinach)	plasma membrane intrinsic protein 2;1, SoPIP2;1
2	E, F, G, H, I... (A, B, C, D)	MERCURY (II) ION	non-polymer		200.6	12	Chemie (HG)
3	Q (C)	water	water		18.0	1	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	119719.3
Non-Polymers*	Number of molecules	12
	Total formula weight	2407.1
All*	Total formula weight	122126.3

*Water molecules are not included.