Figure 3.

Matched EThcD (supplemental HCD of 20 NCE) spectra of the +3 charged K+ adducts of QFPTDYDEGQDDR either sulfated (a) or phosphorylated (b) on Y6; sequence coverage and ppm errors for sulfated (c) and phosphorylated (d) QFPTDYDEGQDDR. 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.