1SAC

THE STRUCTURE OF PENTAMERIC HUMAN SERUM AMYLOID P COMPONENT

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 (A, B, C, D, E)	SERUM AMYLOID P COMPONENT	polymer	204	23282.5	5	UniProt (P02743) Pfam (PF00354)	Homo sapiens (human)
2	F, G, I, J, L... (A, B, C, D, E)	CALCIUM ION	non-polymer		40.1	10	Chemie (CA)
3	H, K, P, S (A, B, D, E)	ACETIC ACID	non-polymer		60.1	4	Chemie (ACY)

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	116412.3
Non-Polymers*	Number of molecules	14
	Total formula weight	641.0
All*	Total formula weight	117053.3

*Water molecules are not included.