Zacchi et al. attempt to bridge the gap between understanding the impact of process variables and determination of critical post-translational modifications on a highly complex glycoprotein, factor IX. They implement an LC-MS/MS approach based on data independent acquisition which allows measurement of all detectable peptides, even with heterogeneous modifications.
- Lucia F. Zacchi
- Dinora Roche-Recinos
- Christopher B. Howard
