The present invention provides novel reactive fluorescent compounds that incorporate stable isotopic (deuterium, 13-carbon, 15-nitrogen, 18-oxygen) substitutions. The invention includes the use of these compounds, in combination with non-isotopically substituted analogs, for the purification, identification and relative quantification of proteins, peptides, saccharides, metabolites, and other biologically important compounds by combining liquid chromatography (LC) and mass spectrometry (MS). Fluorescent labeling of target compounds in this manner provides orders-of-magnitude sensitivity enhancement over traditional stable isotope labels, and also affords the possibility of simultaneous multiplexed analysis due to the multiwavelength nature of different fluorophores.
本发明提供了新型反应性荧光化合物,其中包含稳定同位素(
氘,13-碳,15-氮,18-氧)取代。该发明包括使用这些化合物与非同位素取代的类似物结合,通过
液相色谱(LC)和质谱(MS)相结合来纯化、鉴定和相对定量蛋白质、肽、糖、代谢物和其他
生物重要化合物。以这种方式对目标化合物进行荧光标记提供了比传统的稳定同位素标记高几个数量级的灵敏度增强,并且由于不同荧光团的多波长性质,还提供了同时多重分析的可能性。