2HTV

N4 neuraminidase

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B (A, B)	Neuraminidase	polymer	390	42933.0	2	UniProt (Q6XV46) Pfam (PF00064)	Influenza A virus
2	C, E (A, B)	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	2	Chemie (NAG)
3	D, F (A, B)	CALCIUM ION	non-polymer		40.1	2	Chemie (CA)
4	G, H (A, B)	water	water		18.0	318	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	85866.0
Non-Polymers*	Number of molecules	4
	Total formula weight	522.6
All*	Total formula weight	86388.6

*Water molecules are not included.