1QLR

CRYSTAL STRUCTURE OF THE FAB FRAGMENT OF A HUMAN MONOCLONAL IgM COLD AGGLUTININ

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, C	IGM KAPPA CHAIN V-III (KAU COLD AGGLUTININ)	polymer	215	23301.8	2	PIR (A23746) Pfam (PF07686) Pfam (PF07654) UniProt (by SIFTS) (Q6PJF2) In PDB	HOMO SAPIENS (HUMAN)
2	B, D	IGM FAB REGION IV-J(H4)-C (KAU COLD AGGLUTININ)	polymer	232	25191.1	2	PIR (B23746)	HOMO SAPIENS (HUMAN)
3	E, F	alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose	branched		367.3	2	In PDB GlyTouCan (G86851RC)

Sequence modifications

A, C: 1 - 214 (PIR: A23746)

PDB	External Database	Details
Cys 23	Gly 23	conflict
Cys 88	Gly 89	conflict
Cys 134	Gly 135	conflict
Cys 194	Gly 195	conflict
Cys 214	Gly 215	conflict

B, D: 2 - 232 (PIR: B23746)

PDB	External Database	Details
Cys 22	Gly 21	conflict

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	96985.7
Branched	Number of molecules	2
	Total formula weight	734.7
All*	Total formula weight	97720.4

*Water molecules are not included.