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. 1979 Jun;37(2):495–503.

Soluble oligovalent antigen--antibody complexes. II. The effect of various selective forces upon relative stability of isolated complexes.

D W Knutson, L A van Es, B S Kayser, R J Glassock
PMCID: PMC1457509  PMID: 468313

Abstract

Soluble oligovalent antigen--antibody complexes were isolated and analysed by ultracentrifugation to assess the effect of several forces upon the composition and stability of soluble complexes. Complexes were prepared with fluorescein (F) conjugates of rabbit serum albumin (RSA) or thyroglobulin (RTg) and high affinity rabbit anti-F antibodies. Isolated complexes containing two antigen molecules (Ag2 complexes) tended to dissociate and form an equilibrium with complexes containing one antigen molecule (Ag1 complexes). This equilibrium was thermolabile, concentration dependent and affected by the original combining ratio and the area in the gradient from which complexes were harvested. Small amounts of free antibody dissociated from soluble complexes also to form a dynamic equilibrium; this equilibrium was much less affected by the above parameters. The data support the concept that complexes grow in size by a process analogous to polymerization of simple subunits and that the driving forces for polymerization are of a lower order of magnitude and more affected by physical variables than the primary reaction between antibody and its antigen.

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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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