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Deuterium incorporation at the α-carbon of amino acids and their methyl esters. (A) Deuterium incorporation into 4 mM of l-substrates after overnight incubation with SxtA AONS in D2O. (B) Total stereoretention of 20 mM of the original methyl ester substrate configuration at the time of highest deuterium incorporation (see Table S8 for full data set).
