Figure 4

Comparison at 30 min and 24 h between results obtained by the addition of the racemic substrate 1 and the pure enantiomers ((R)-1 and (S)-1). Increased orange color intensity corresponds to higher absorbance values (reported in the cells) and consequently to a more active enzyme. Ovrflw: absorbance values over 3 (corresponding to the limit of the instrument used for the detection).