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Volume contraction of the gel II in the presence of acetic acid as cofactor, induced either by (-)-L-DBTA (filled circles), or by (+)-D-DBTA (open circle) at pH 3.5; starting volume of gel particle 5 ± 0.3 mm3. Schneider, H. J.; Kato, K. Direct translation of chiral recognition into mechanical motion. Angew. Chem. 2007, 119, 2748 -2750; Angew. Chem. Int. Ed. Engl. 2007, 46, 2694 -2696. Copyright Wiley-VCH Verlag GmbH & Co..[70]
