7PKE

C-reactive protein pentamer at pH 7.5 with phosphocholine ligand

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	E, D, C, B, A	C-reactive protein	polymer	206	23068.0	5	UniProt (P02741) Pfam (PF00354) In PDB	Homo sapiens (Human)
2	E, D, C, B, A	CALCIUM ION	non-polymer		40.1	10	Chemie (CA)
3	E, D, C, B, A	PHOSPHOCHOLINE	non-polymer		184.2	5	Chemie (PC)
4		water	water		18.0	5	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	5
	Total formula weight	115340.2
Non-Polymers*	Number of molecules	15
	Total formula weight	1321.5
All*	Total formula weight	116661.7

*Water molecules are not included.