4D64

Structure of porin Omp-Pst1 from P. stuartii; the crystallographic symmetry generates a dimer of trimers.

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	PORIN 1	polymer	352	39034.5	3	UniProt (E3U904) Pfam (PF00267) In PDB	PROVIDENCIA STUARTII
2	A	CALCIUM ION	non-polymer		40.1	1	Chemie (CA)
3		water	water		18.0	160	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	3
	Total formula weight	117103.6
Non-Polymers*	Number of molecules	1
	Total formula weight	40.1
All*	Total formula weight	117143.7

*Water molecules are not included.