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. 1967 Nov;13(5):489–499.

Interaction of IgG and its fragments with red cells

P J Grob, D Frommel, H C Isliker, S P Masouredis
PMCID: PMC1409187  PMID: 4169337

Abstract

The red cell uptake of 131I following incubation of red cells with [131I] IgG prepared from normal donors was shown to be IgG and not trace contaminants such as transferrin, lipids or iodide. The criteria used were immunodiffusion, DEAE chromatography, gel filtration and exchange with unlabelled lipoproteins and plasma. The uptake of [131I]IgG was pH and ionic strength dependent and was influenced by the proportion of cells to IgG present during the reaction. With constant cell concentration the uptake of [131I]IgG increased progressively as more IgG was added to the cells and approached an asymptotic value suggesting that there was saturation of red cell binding sites. When the IgG concentration was kept constant the uptake of IgG was inversely proportional to the red cell concentration. No difference in the molar binding of IgG, Fab or Fc was found indicating that the non-antibody binding of IgG does not preferentially involve any part of the IgG molecule. The molar quantities of carefully prepared [131I]IgG bound to red cells were similar to those obtained with [131I]BSA. The non-antibody red cell binding of IgG was contrasted with the antibody type of IgG binding.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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