Can you enrich for more than one PTM in a PTMScan® sample?

Yes, the flow through from a PTMScan experiment can be saved and stored at -80C for future enrichments. We have performed 5 different PTM enrichments sequentially from one sample. The limitation would be the choice of the initial protease used for the digest. For example, a UbiScan PTMScan requires peptides digested with trypsin and the flow through peptides may not be ideal to capture peptides that require an arginine (R) residue in the phospho-motif as in the AKT or AMPK substrate PTMScan kits.

Last updated: October 6, 2025