Abstract
Abstract Studies are presented of dynamic light scattering from colloidal suspensions of fractionated ferrofluid particles (40-60 nm average diameter) coated with bovine serum albumin (BSA) and subjected to BSA antibodies and soluble BSA in a competitive binding mode. The observed slowly decaying component in the autocorrelation spectrum originates from the motion of BSA coated colloidal particle-antibody aggregates. Measurements of antigen-antibody kinetics and soluble BSA dose response suggest that the BSA coated particles behave as “large” antigen molecules.
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