3BOK

Structure of the C. botulinum neurotoxin serotype A apo-enzyme

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	Neurotoxin A	polymer	425	48793.1	1	UniProt (A2I2U2) Pfam (PF01742) UniProt (by SIFTS) (P0DPI1)	Clostridium botulinum
2	B (A)	water	water		18.0	787	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	48793.1
All*	Total formula weight	48793.1

*Water molecules are not included.