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. Author manuscript; available in PMC: 2007 Mar 21.
Published in final edited form as: Mass Spectrom Rev. 2006;25(3):450–482. doi: 10.1002/mas.20071

Figure 17.

Figure 17

Schematic depicting the phosphoprotein isotope-coded solid-phase tag (PhIST) approach. Proteins containing phosphoseryl or phosphothreonyl residues are derived by β-elimination and ethane-1,2-dithiol addition. After proteolytic digestion, modified phosphopeptides are captured and labeled by isotope-coded solid phase reagents.