Figure 5

Spectra indicating the presence of OC-17 in the turkey eggshell proteome. This figure shows selected spectra of the two ovocleidin-17 peptides. Top, this triply charged peptide was identified with a mass error of 0.7 ppm and a PEP of 1.9^-102. Bottom, doubly charged peptide with a mass error of 0.3 ppm and a PEP of 0.01. Four MaxQuant Expert System annotations for major peaks are shown in black in addition to the simple fragment annotation. These were two internal fragments, the immonium ion of tryptophane, and an a2 ion with loss of the tryptophane residue from the peptide backbone. Full expert annotation was omitted for sake of clarity.