1FE1

CRYSTAL STRUCTURE PHOTOSYSTEM II

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, J (A, J)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBA)	polymer	169	14400.7	2		Synechococcus elongatus
2	B, K (B, K)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBD)	polymer	174	14826.3	2		Synechococcus elongatus
3	C, L (C, L)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBC)	polymer	156	13294.4	2		Synechococcus elongatus
4	D, M (D, M)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBB)	polymer	155	13209.3	2		Synechococcus elongatus
5	E, N (E, N)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBE)	polymer	40	3422.2	2		Synechococcus elongatus
6	F, O (F, O)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBF)	polymer	30	2571.2	2		Synechococcus elongatus
7	G, P (G, P)	PROTEIN (PHOTOSYSTEM II: SUBUNIT UNKNOWN)	polymer	312	26570.6	2		Synechococcus elongatus
8	H, Q (H, Q)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBO)	polymer	115	9805.1	2		Synechococcus elongatus
9	I, R (I, R)	PROTEIN (PHOTOSYSTEM II: SUBUNIT PSBV)	polymer	87	7422.1	2		Synechococcus elongatus
10	LB, MB, NB, OB, S... (J, A)	MANGANESE (II) ION	non-polymer		54.9	8	Chemie (MN)
11	DA, PB, W, WB (B, J, A, K)	TYROSINE	non-polymer		181.2	4	Chemie (TYR)
12	AB, BA, BB, BC, BD... (D, A, L, P, B...)	CHLOROPHYLL A	non-polymer		893.5	64	Chemie (CLA)
13	AA, FA, TB, YB (A, B, J, K)	PHEOPHYTIN A	non-polymer		871.2	4	Chemie (PHO)
14	CA, VB (B, K)	FE (III) ION	non-polymer		55.8	2	Chemie (FE)
15	AC, HA (K, B)	2-[(3-HYDROXY-2-METHYL-5-PHOSPHONOOXYMETHYL-PYRIDIN-4-YLMETHYL)-AMINO]-2-METHYL-SUCCINIC ACID	non-polymer		378.3	2	Chemie (PLA)
16	AD, DD, HB, KB (O, R, F, I)	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	4	Chemie (HEM)
17	CD, JB (Q, H)	CADMIUM ION	non-polymer		112.4	2	Chemie (CD)

Contents of the asymmetric unit

Polymers	Number of chains	18
	Total formula weight	211043.7
Non-Polymers*	Number of molecules	90
	Total formula weight	65391.4
All*	Total formula weight	276435.0

*Water molecules are not included.