Peptide quantitation using primary amine selective metal chelation labels for mass spectrometryElectronic supplementary information (ESI) available: Tandem mass spectrometry data illustrating the location of the primary amine tag are provided along with spectra showing metal system selection criteria. See DOI: 10.1039/b926290c

Primary amine selective lanthanide metal chelating labels are demonstrated for enhancing the number of simultaneous relative peptide quantitation measurements that can be performed in mass spectrometry analyses. Primary amine selective lanthanide metal chelating labels are demonstrated for enhancing the number of simultaneous relative peptide quantitation measurements that can be performed in mass spectrometry analyses.