2Z2X

Crystal structure of mature form of Tk-subtilisin

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	Tk-subtilisin	polymer	318	33006.5	1	UniProt (P58502) Pfam (PF00082) In PDB	Thermococcus kodakarensis
2	A	CALCIUM ION	non-polymer		40.1	7	Chemie (CA)
3		water	water		18.0	299	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	33006.5
Non-Polymers*	Number of molecules	7
	Total formula weight	280.5
All*	Total formula weight	33287.0

*Water molecules are not included.