1ADQ:
reference: Structure of human IgM rheumatoid factor Fab bound to its autoantigen IgG Fc reveals a novel topology of antibody-antigen interaction., Corper AL, Sohi MK, Bonagura VR, Steinitz M, Jefferis R, Feinstein A, Beale D, Taussig MJ, Sutton BJ, Nat Struct Biol 1997 May;4(5):374-81. PMID: 9145108

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).