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	H, h	heavy chain of Fab	polymer	467	51448.1	2		Homo sapiens
2	L, l	light chain of Fab	polymer	235	25717.7	2		Homo sapiens
3	c, C	Cytotoxic T-lymphocyte protein 4	polymer	126	13510.3	2	UniProt (P16410) Pfam (PF07686) In PDB	Homo sapiens (Human)	Cytotoxic T-lymphocyte-associated antigen 4,CTLA-4
4		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.