7ELX

The crystal structure of CTLA-4 and Fab

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C (H, h)	heavy chain of Fab	polymer	467	51448.1	2		Homo sapiens
2	B, D (L, l)	light chain of Fab	polymer	235	25717.7	2		Homo sapiens
3	E, F (c, C)	Cytotoxic T-lymphocyte protein 4	polymer	126	13510.3	2	UniProt (P16410) Pfam (PF07686)	Homo sapiens (Human)	Cytotoxic T-lymphocyte-associated antigen 4,CTLA-4
4	G, H, I, J, K... (H, L, h, l, c...)	water	water		18.0	632	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	6
	Total formula weight	181352.2
All*	Total formula weight	181352.2

*Water molecules are not included.