Enhanced Amine and Amino Acid Analysis Using Pacific Blue and the Mars Organic Analyzer Microchip Capillary Electrophoresis System
作者:Thomas N. Chiesl、Wai K. Chu、Amanda M. Stockton、Xenia Amashukeli、Frank Grunthaner、Richard A. Mathies
DOI:10.1021/ac8023334
日期:2009.4.1
amino acids by their hydrophobicity is also demonstrated. The optimized MEKC conditions (45 mM CHAPSO, pH 6 at 5 °C) effectively separated amines and 25 amino acids with enantiomeric resolution of alanine, serine, and citrulline. Samples from the Yungay Hills region in the Atacama Desert, Chile, and from the Murchison meteorite are successfully analyzed using both techniques, and amino acids are found
荧光胺反应探针太平洋蓝琥珀酰亚胺酯(PB)用于通过火星有机分析仪(MOA)上的微芯片毛细管电泳检测痕量的胺和氨基酸。与荧光胺衍生化相比,PB的光谱和化学性质使其灵敏度提高200倍,并提高了分离度。通过使用交叉注射和PB标记,MOA可以检测到浓度低至75 pM(万亿分之一)的氨基酸。还证明了胶束电动色谱法(MEKC),其通过PB标记的氨基酸疏水性进行分离。优化的MEKC条件(45 mM CHAPSO,在5°C下pH为6)可有效分离胺和25个氨基酸,对映体分辨率为丙氨酸,丝氨酸和瓜氨酸。使用这两种技术成功地分析了智利阿塔卡马沙漠的云盖山地区和默奇森陨石的样品,发现的氨基酸含量在十亿分之一范围内。在Murchison样品中检测到了非生物氨基酸,例如β-丙氨酸和ε-氨基癸酸以及几种中性和酸性氨基酸。发现阿塔卡马沙漠样品含有同手性1-丙氨酸和1-丝氨酸表明存在或已经灭绝的生命。