1Q9K

S25-2 Fab Unliganded 1

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A (A)	S25-2 Fab (IgG1k) light chain	polymer	219	24242.9	1		Mus musculus (house mouse)
2	B (B)	S25-2 Fab (IgG1k) heavy chain	polymer	222	24111.0	1		Mus musculus (house mouse)
3	C, D, E, F (A)	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
4	G, H (A, B)	water	water		18.0	269	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	2
	Total formula weight	48353.9
Non-Polymers*	Number of molecules	4
	Total formula weight	97.2
All*	Total formula weight	48451.1

*Water molecules are not included.