All the peptides identified in the MS fragment analysis are shown in gray (a unique peptide is highlighted in orange). All the tryptic peptides are located after the Ser³⁸⁸ (human analog of human Ser³⁹⁶) and near to the C-terminus of full-length Tau from rat. The total Tau antibody binding site, indicated in the C-terminus, refers to the region where the proprietary sequence is located.