A colorimetric method of determining gama-aminobutyric acid (GABA) in glutamate decarboxylase (GAD) activity assay with high sensitivity, accuracy and reproducibility is proposed, and the standard procedure leading to the establishment of the method is described. The reaction mixture (0.4ml) of GAD and L-Glu is mixed with 1mol/L Na2CO3 (0.1ml), 0.2mol/L borate buffer (0.5ml) and 6% phenol (1.0ml), then added 1ml of 5.2% sodium hypochlorite solution at 20℃ within 5min. After being kept at 20℃ for 4~8min, the...
【更新日期】
2006-07-31
【分类号】
Q503
【正文快照】
γ-氨基丁酸(γ-aminobutyricacid,GABA)是一种非蛋白质组成的天然氨基酸,为哺乳动物中枢神经系统一种主要的抑制性神经递质,具有重要的生理功能。谷氨酸脱羧酶(Glutamatedecarboxylase,GAD,EC4.1.1.15)在生物合成中,是催化谷氨酸脱羧生成G A B A的唯一酶。谷氨酸已经通过发酵?