Fig. 2. (A) Percentage stacked area plots illustrating the yield of c, z˙ and c˙, z fragments (filled circles), products from loss of small molecules (>70% NH3; <30% CO, CONH3, C2H6O, C2H4O2) from reduced molecular ions (open circles), and reduced molecular ions (triangles) of which ∼20% showed loss of H˙ but not Na˙, from niECD of phosphopeptide anions with a net charge of 2– at 10 V (left) and 80 V (right) skimmer potential, and (B) corresponding electron capture efficiency versus the number of Na+ ions attached; solid lines in (A) are quadratic polynomial functions used for error analysis and dashed lines in (B) are exponential fit functions.
