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Top: protein identifications resulting from LC FAIMS ETD MS/MS with external CV stepping (pink), internal CV stepping (green), and LC ETD MS/MS with SCX prefractionation (blue); middle: protein identifications resulting from external CV stepping (pink) and SCX prefractionation (blue); bottom: number of peptides identified per protein for each of the sections of Figure 1 middle (external CV stepping only, both external CV stepping and SCX prefractionation, SCX prefractionation only)
