D-Tartaric acid-D-Tartaric aci

酒石酸 tartaric acid

  　　即二羟基琥珀酸。有二个不对称碳原子，有四种立体异构体，即：右旋型（ D型， L型）、左旋型（ L型， D型）、内消旋型、外消旋型。通常，外消旋型酒石酸又称为葡萄酸。右旋型酒石酸以游离的或 K盐、 Ca盐、 Mg盐的形态广泛分布于高等植物中，特别是多存在于果实和叶中。在制造葡萄酒时，会沉积大量酒石（氢钾盐）。另外，在霉菌和地衣类中也常见到它的存在。最近分离到的酒石酸发酵细菌（ Gluconoba-cter suboxydans的变异菌株），在体

Assays of d-Amino Acid Oxidases

d -Amino acid oxidase and d -aspartate oxidase are two well-known FAD-containing flavooxidases that catalyze the same reaction (the oxidative deamination) on different d -amino acids. d -aspartate oxidase is specific for acidic d -amino

Biosensors for d-Amino Acid Detection

are needed: biosensors can often satisfy these requirements. The use of an enzymatic, stereospecific reaction could confer selectivity to a biosensor for detecting and quantifying d -amino acids in foodstuffs. The flavoenzyme d -amino acid oxidase