1AR2

DISULFIDE-FREE IMMUNOGLOBULIN FRAGMENT

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	REI	polymer	109	11921.2	1	UniProt (P01607) Pfam (PF07686) UniProt (by SIFTS) (P01593) In PDB	Homo sapiens (human)	IG KAPPA CHAIN V-I REGION
2		water	water		18.0	17	Chemie (HOH)

Sequence modifications

A: 3 - 109 (UniProt: P01607)

PDB	External Database	Details
Val 25	Cys 23	engineered mutation
His 34	Tyr 32	engineered mutation

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	11921.2
All*	Total formula weight	11921.2

*Water molecules are not included.