Abstract
EXTENSIVE use of the guinea-pig as an experimental animal necessitated investigation of its immunoglobulins. The guinea-pig has been found to possess two IgG classes: γ1 and γ2 differing in many characteristics, in particular in their immunoelectrophoretic mobility1,2. The antibodies of γ1 class mediate passive systemic or cutaneous anaphylaxis; γ2 antibodies cannot do this, but they inhibit specifically passive cutaneous anaphylaxis provoked by γ1 antibodies by competing for the antigen. The antibodies of γ2 class lack the receptors for fixation to guinea-pig tissues and do not compete with sensitizing antibodies for the receptor sites3. The γ2 antibodies fix complement in the presence of antigen; γ1 antibodies lack this capability. The antibodies of γ2 class are more efficient than γ1 in provoking haemorrhagic necrosis in reverse passive Arthus reaction4. This topic has recently been reviewed in detail5.
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KELUS, A. Allotypic Marker GPγ2-I of Guinea-pig Immunoglobulins. Nature 223, 398–399 (1969). https://doi.org/10.1038/223398a0
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DOI: https://doi.org/10.1038/223398a0
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