2RTQ

STREPTAVIDIN-2-IMINOBIOTIN COMPLEX, PH 3.25, SPACE GROUP I222, CRYSTALLIZED FROM 4.3 M AMMONIUM SULFATE

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	B, D	STREPTAVIDIN	polymer	135	14181.3	2	UniProt (P22629) Pfam (PF01382) In PDB	Streptomyces avidinii
2	B, D	2-IMINOBIOTIN	non-polymer		243.3	2	Chemie (IMI)
3		water	water		18.0	123	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	28362.6
Non-Polymers*	Number of molecules	2
	Total formula weight	486.7
All*	Total formula weight	28849.3

*Water molecules are not included.