L-天冬氨酸L-Aspartic acid

Estimation of Chronological Age from the Racemization Rate of l- and d-Aspartic Acid: How to Completely Separate Enantiomers from Dentin

Estimation of chronological age is essential in forensic and archeological science. The racemization method is one of the best methods to meet the demands of these scientific fields, providing both accuracy of the estimated age and simplicity

脲基琥珀酸 ureidosuccinic acid

亦称氨甲酰天冬氨酸，由氨甲酰磷酸和 L-天冬氨酸生成，为乳清酸的前体物质，核酸的嘧啶碱基的前体物质。    

尿刊酸 urocanic acid

β-咪唑丙烯酸。给予狗大量的组氨酸后可从尿中得到，还有细菌作用于组氨酸也能生成尿刊酸。在哺乳类的肝脏或细菌中作为从组氨酸到谷氨酸的代谢途径的中间体，在组氨酸酶的作用下进行分子内的无氧脱氨基而生成。通常尿刊酸在肝脏酶（尿刊酸酶）的作用下进一步分解转变成谷氨酸。