1XEV

Crystal structure of human carbonic anhydrase II in a new crystal form

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	Carbonic anhydrase II	polymer	260	29289.1	4	UniProt (P00918) Pfam (PF00194) In PDB	Homo sapiens (human)	Carbonate dehydratase II, CA-II, Carbonic anhydrase C
2	A, B, C, D	ZINC ION	non-polymer		65.4	4	Chemie (ZN)
3		water	water		18.0	603	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	117156.2
Non-Polymers*	Number of molecules	4
	Total formula weight	261.6
All*	Total formula weight	117417.9

*Water molecules are not included.