ANYA - Hansen,K.C.; Schmitt-Ulms,G.; Chalkley,R.J.; Hirsch,J.; Baldwin,M.A.; Burlingame,A.L. - Mass Spectrometric Analysis of Protein Mixtures at Low Levels Using Cleavable 13C-Isotope-coded Affinity Tag and Multidimensional Chromatography - Molecular and Cellular Proteomics 2003 May; 2(5): 299-314