8RI6

Beta-galactosidase (LacZ) purified from E. coli.

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 (A, B, C, D)	Beta-galactosidase	polymer	1030	117397.3	4	UniProt (P00722) Pfam (PF02837) Pfam (PF00703) Pfam (PF02836) Pfam (PF16353) Pfam (PF02929)	Escherichia coli	Beta-gal,Lactase
2	E, F, I, J, M... (A, B, C, D)	MAGNESIUM ION	non-polymer		24.3	8	Chemie (MG)
3	G, H, K, L, O... (A, B, C, D)	SODIUM ION	non-polymer		23.0	8	Chemie (NA)
4	U, V, W, X (A, B, C, D)	water	water		18.0	998	Chemie (HOH)

Sequence modifications

A, B, C, D: 1 - 1024 (UniProt: P00722)

PDB	External Database	Details
Leu 1008	Phe 1008	conflict
His 1025	-	expression tag
His 1026	-	expression tag
His 1027	-	expression tag
His 1028	-	expression tag
His 1029	-	expression tag
His 1030	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	469589.2
Non-Polymers*	Number of molecules	16
	Total formula weight	378.4
All*	Total formula weight	469967.6

*Water molecules are not included.