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Matched EThcD (supplemental HCD of 30 NCE) spectra of the +4 charged K+ adducts of IHDSSEIEDENDADSDYQDELALILGLR, either sulfated (a) or phosphorylated (b) on Y17; sequence coverage and ppm errors for the sulfated (c) and phosphorylated (d) sequence; colors are associated with the type of product ion: green for c-type, yellow for z-type, red for y-type; blue for b-type; gray for precursors.
