Figure 3.

% STD build-up curves obtained at 290 K for α-2FDM (left) and β-2FDM (right) in the presence of ConA (90 µM) at several total concentrations of monosaccharide 0.96 (●); 1.94 (○); 4.14 (▼); 5.57 (Δ); and 12.1 mM (■) (anomer percentages 66% α-2FDM and 34% β-2FDM). The representation of ¹⁹F STD intensity versus saturation time shows that a stationary state, where saturation is compensated by relaxation, is reached at an approximate spin irradiation time of 6 s.