5NTB

Streptomyces papain inhibitor (SPI)

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	Papain inhibitor	polymer	110	12041.7	2	UniProt (P86242) Pfam (PF03330) In PDB	Streptomyces mobaraensis	SPI
2	A, B	SULFATE ION	non-polymer		96.1	3	Chemie (SO4)
3		water	water		18.0	232	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	24083.4
Non-Polymers*	Number of molecules	3
	Total formula weight	288.2
All*	Total formula weight	24371.6

*Water molecules are not included.