4D2O

Crystal structure of the class A extended-spectrum beta-lactamase PER- 2

Replaces:  3ZNW

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	PER-2 BETA-LACTAMASE	polymer	284	30956.3	2	UniProt (A2RP81) Pfam (PF00144) Pfam (PF13354) In PDB	CITROBACTER FREUNDII	CLASS A BETA-LACTAMASE
2		water	water		18.0	152	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	61912.7
All*	Total formula weight	61912.7

*Water molecules are not included.