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. Author manuscript; available in PMC: 2010 Nov 16.
Published in final edited form as: J Am Soc Mass Spectrom. 2010 Jun 19;21(10):1649–1659. doi: 10.1016/j.jasms.2010.06.005

Figure 4.

Figure 4

LC/ETD/MS/MS of the [M+4H]4+ ion of m/z 681.1 corresponding in mass to the pentaphosphorylated αS1 tryptic peptide T8 after enrichment with magnetic TiO2 beads.