2IZH

STREPTAVIDIN-BIOTIN PH 10.44 I222 COMPLEX

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	123	12965.0	2	UniProt (P22629) Pfam (PF01382) In PDB	Streptomyces avidinii
2	B, D	BIOTIN	non-polymer		244.3	2	Chemie (BTN)
3		water	water		18.0	225	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	25930.0
Non-Polymers*	Number of molecules	2
	Total formula weight	488.6
All*	Total formula weight	26418.7

*Water molecules are not included.