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  • Title: The structural requirements for complement activation by IgG: does it hinge on the hinge?
    Author: Brekke OH, Michaelsen TE, Sandlie I.
    Journal: Immunol Today; 1995 Feb; 16(2):85-90. PubMed ID: 7888072.
    Abstract:
    The flexibility of antibody molecules principally derives from the structure of the hinge region. It has generally been accepted that the flexibility of the IgG hinge is necessary for complement activation to occur; however, recent studies dispute this premise. As described here by Ole Henrik Brekke, Terje Michaelsen and Inger Sandlie, it now appears that the only requirement of the hinge region for complement activation is the presence of inter-heavy-chain disulfide bond(s). Furthermore, the structural basis for the differences between IgG subclasses with respect to effector functions appear to be located within the CH2 domain of the immunoglobulin molecule.
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