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. Author manuscript; available in PMC: 2015 Oct 12.
Published in final edited form as: Cancer Lett. 2009 Feb 15;286(1):134–139. doi: 10.1016/j.canlet.2009.01.025

Fig. 2.

Fig. 2

Schematic view of the protein identification process. Approximately 50 fractions generated from 1 sample are analyzed by LC-MS/MS using the highly sensitive LTQ-FT or LTQ-Orbitrap mass spectrometer. The data are searched against the non-redundant human International Protein Index (IPI) protein sequence database with the X!Tandem Search engine. ProteinProphet and PeptideProphet statistical tools are used to filter peptide and proteins identified with less than 1% error rate.