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Interactions of glucose and fructose with PBA units. A single glucose molecule can bind to one (monobidentate) or two (bisbidentate) PBA units at low and intermediate concentrations. Bisbidentate interactions lead to reversible crosslinks between polymer chains. At higher concentrations free glucose competes with bisbidentate glucose for PBA sites, reducing bisbidentate interactions. Fructose is only capable of monobidentate binding, and it inhibits bisbidentate crosslink formation.
