I have mass-spectrometry data (Human cellsanalyzed and annotated by MaxQuant). I want to find which peptides are covering positions of former splice junctions (on the mRNA sequence), based on protein id and peptide positions.
Where could I find an appropriate data? I want to know, based on peptide-sequence, annotaion and position on protein, whether this peptide is a single exon, or if it contained areas of former splice junctions.
Itai