Supplemental Data

• Supplementary Data 1 - Peptide lists for specificity estimation
• Supplementary Data 3 - Peptide lists for sequence motifs
• Supplementary Data 2 - Peptide sequences identified in HeLa, Pleistocene mammoth and N3ICD immunoprecipitate samples.
• Supplementary Data 4A - Protein groups for mammoth bone analysis
• Supplementary Data 4B - Protein groups from analysis of N3ICD
• Supplementary Data 5 - Mammoth peptide lists for maximum missed cleavage estimation
• Supplementary Data 6 - Phosphorylation site analysis of N3ICD
• Supplementary Data 7 - Peptide lists from de novo sequencing of N3ICD
• Supplementary material - Supplementary figures and tables
• Supplementary Data 9 - Protein groups identified in multi-enzymatically digested HeLa cell lysate.
• Supplementary Data 8 - Peptide sequences identified in multi-enzymatically digested HeLa cell lysate.