3ZDJ

Ancestral (ENCA) beta-lactamase class A

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	ENCA BETA-LACTAMASE	polymer	263	28598.6	2		SYNTHETIC CONSTRUCT
2	A, B	SULFATE ION	non-polymer		96.1	4	Chemie (SO4)
3		water	water		18.0	171	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	57197.3
Non-Polymers*	Number of molecules	4
	Total formula weight	384.3
All*	Total formula weight	57581.5

*Water molecules are not included.