A notable characteristic of amino acids is their optical isomerism, existing as L-form and D-form. Proteins are composed exclusively of L-form amino acids. However, recently, it is reported that D-alanine is evaluated particularly highly in terms of sensory evaluation. D-body amino acids convert L-body amino acid proteolysis from a substrate such as foods during fermentation of lactic acid bacteria. This chapter presents a description of methods used for D-alanine racemase assays in the solution producing by lactic acid bacteria (LAB) using D-amino acid oxidase and lactic acid dehydrogenase via a NADH oxidoreduction system.
Keywords: Alanine racemase; D-alanine; D-amino acid oxidase; NADH; Oxidoreduction system.
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