abstract |
The present invention relates to methods, mixtures, kits and compositions relating to the determination of analytes by mass spectrometry. The present invention relates to the determination of analyte (s) by mass spectrometry. The analyte can be any molecule of interest. The analyte can be determined using a unique labeling reagent that allows relative and / or absolute quantification of the analyte in the complex mixture. These labeling reagents can be used in sets for the analysis of complex sample mixtures, where the labeling reagents can be isomeric and / or isobaric. |