[Figure 3]
While comparing the overall data set presented in FigureĀ 3 it is clear that cation exchange resins clearly result in a stronger removal (entries 1-4) from the aqueous reaction medium in comparison to the anion exchange resins (entries 5-7), which is expected since the substrate and product are both positively charged (FigureĀ 4). However, the hydrophobic backbone of the tested anion exchange resins still provides a residual, relatively weak reactant adsorption that slightly favors the product (S )-2-MPN from the imine reductase-catalyzed reaction.