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Chromatographic information for H3 9–17 obtained on LTQ Velos Pro or LTQ-Orbitrap Velos Pro. The mass tolerance used for selection is 150 ppm for the LTQ Velos Pro and 10 ppm for the LTQ-Orbitrap Velos Pro. In each row, labeled 1 to 7, the mass of the peptide bearing a specific modification was specified. Rows 1 to 5 represent endogenous peptides while rows 6 and 7 represent heavy-labeled synthetic peptides.
