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Immobilized pH gradient isoelectric focusing and immunoblotting for investigations of anti-Borrelia burgdorferi IgG antibodies.

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Abstract

Anti-Borrelia burgdorferi immunoglobulin G (IgG) responses in cerebrospinal fluid, serum, and joint fluid from
Lyme disease patients were investigated by immobilized pH gradient (IPG) isoelectric focusing (IEF) in pH 4-10 and pH 4-7 gels. After focusing, the anti-B.-burgdorferi antibodies were blotted by affinity-driven transfer to antigen-coated polyvinylidene difluoride membranes (immunoblot) and the IgG antibodies were immunoenzymatically stained. IPG-IEF gels gave an excellent resolution of IgG and the immunoblot proved advantageous for the detection of anti-B. burgdorferi IgG antibodies. These antibodies, as judged from the electromigration characteristics, were found to contain oligoclonal as well as polyclonal subpopulations. This latter group included IgG antibodies that were inadequately resolved when separated by conventional carrier ampholyte IEF.

Electrophoresis. 1992 Apr;13(4):229-34. Research Support, Non-U.S. Gov’t

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