Figure 3.
Typical CID profiles (a) showing the decrease in intensity of the [M + 4 H]4+ peptide: DNA complexes as a function of collision energy (eV), charge (z) and degrees of freedom (DoF). The dissociation threshold (inset) shows the absolute derivative of each CID profiles as a function of the collision energy. The binding affinity (b) and distance matrix (c) illustrates the influence of the single amino acid substitution on the peptide-DNA binding affinity.