FIGURE 5.
LTQ-FTICR ECD MS analysis of the 4+ ion of the SUATM129 trypsin+Asp-N C9+C10+C11, C12 disulfide-bonded peptides, mass 736.07969. MS analysis of the ECD reaction shows the 4+ ion mass of the original bonded peptides and each individual peptide: the peptide (z = 1) containing C9, the peptide (z = 1) containing C10, and the peptide (z = 1) containing C11 and C12.