Figure 4. Comparison of the peptides identified in the current study to other published peptidomic and proteomic data.

Only 23% of the peptides identified in the current study were part of the peptide set reported by Zougman et al. [14]. Comparison of the proteins represented by the endogenous peptides identified in the current study and in the study by Zougman et al. with the proteins identified in the CSF proteomic analysis by Schutzer et al. [7] (b) reveals that both peptide sets have a high degree overlap with the proteomic set.