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Radial distribution functions calculated from molecular models point to the difference between conformations of immunoglobulin M and human rheumatoid factor, based on small-angle X-ray solution scattering data.
The shapes of rheumatoid factor molecules calculated from X-ray small-angle solution scattering data suggest that the peripheral Fab regions of rheumatoid factor in solution are more flocculent because of a higher flexibility of Fab domains.