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BACKGROUND/AIMS Protein and carbohydrate antigens of Porphyromonas gingivalis interact with the host to produce antibody of different subclasses. IgG1 and IgG2 antibodies frequently account for approximately 90% of the total serum IgG. This work aimed to investigate serum IgG1 and IgG2 antibody responses of periodontitis patients to protein and(More)
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