1SGZ

Crystal Structure of Unbound Beta-Secretase Catalytic Domain.

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-secretase	polymer	389	43312.8	4	UniProt (P56817) Pfam (PF00026)	Homo sapiens (human)	Beta-site APP cleaving enzyme, Beta-site amyloid precursor protein cleaving enzyme, Aspartyl protease 2, Asp 2, ASP2, Membrane-associated aspartic protease 2, Memapsin-2
2	E, F, G, H (A, B, C, D)	water	water		18.0	910	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	173251.2
All*	Total formula weight	173251.2

*Water molecules are not included.