Abstract
We present real-time observations of a structurally variable process for cross-linking agglutination between multivalent lectins and glycoclusters using a small-angle forward static light scattering (F-SLS) technique. In this study, a cross-linking agglutination reaction was carried out using a tetravalent Neu5Acα2,6LacNAc-glycocluster and Sambucus sieboldiana agglutinin (SSA). The scattering intensity of time-resolved F-SLS increased with formation of the Neu5Acα2,6LacNAc-glycocluster-SSA cross-linked complex. Using this approach, fine sequential cross-linking agglutination between glycoclusters and lectins was observed in real-time. The rate of increase in the intensity of time-resolved F-SLS increased with the concentration of sialo-glycoclusters and SSA. Structural analysis based on the fractal dimension using time-resolved F-SLS patterns revealed that the density of the aggregates changed with progression of the cross-linking reaction until equilibrium was reached. This is the first report to evaluate the cross-linking agglutination reaction between glycoclusters and lectins and analysis of the subsequent structure of the obtained aggregates using time-resolved measurements of F-SLS.
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