8B2Y

Structure of the weakly red fluorescent protein csiFP4 from Clytia simplex

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)	CsiFP4 chain A	polymer	235	26160.7	4		Clytia
2	AA, BA, E, EA, F... (C, A, D, B)	SULFATE ION	non-polymer		96.1	23	Chemie (SO4)
3	CA, DA, HA, IA, N... (C, D, A, B)	CHLORIDE ION	non-polymer		35.5	8	Chemie (CL)
4	JA, KA, LA, MA (A, B, C, D)	water	water		18.0	297	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	104642.7
Non-Polymers*	Number of molecules	31
	Total formula weight	2493.1
All*	Total formula weight	107135.8

*Water molecules are not included.