| 2J6E: reference: Crystal structure of a human autoimmune complex between IgM rheumatoid factor RF61 and IgG1 Fc reveals a novel epitope and evidence for affinity maturation., Duquerroy S, Stura EA, Bressanelli S, Fabiane SM, Vaney MC, Beale D, Hamon M, Casali P, Rey FA, Sutton BJ, Taussig MJ, J Mol Biol. 2007 May 18;368(5):1321-31. Epub 2007 Mar 6. PMID: 17395205 |
This OCA 
Structure page
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(documentation).