4V40

BETA-GALACTOSIDASE

This is a non-PDB format compatible entry.

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, E... (A, B, C, D, E...)	BETA-GALACTOSIDASE	polymer	1023	116471.3	16	UniProt (P00722) Pfam (PF02837) Pfam (PF00703) Pfam (PF02836) Pfam (PF16353) Pfam (PF02929)	Escherichia coli
2	AA, BA, CA, DA, EA... (F, G, H, I, J...)	MAGNESIUM ION	non-polymer		24.3	31	Chemie (MG)
3	AB, BB, CB, DB, EB... (F, G, H, I, J...)	water	water		18.0	1455	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	16
	Total formula weight	1863540.8
Non-Polymers*	Number of molecules	31
	Total formula weight	753.5
All*	Total formula weight	1864294.2

*Water molecules are not included.