Jason C. Rouse

Articles

In-Depth Analysis of Host Cell Protein (HCP) Impurities by LC–MS/MS to Augment Routine HCP-ELISA Testing of Biotherapeutics

Ying Zhang;Jason C. Rouse

October 1st 2021

LC–MS/MS has gained momentum as an orthogonal approach to ELISA for host-cell protein (HCP) analysis. LC–MS/MS can identify and quantify individual HCPs, and help ensure that no HCPs evade detection above a reportable limit.

Minimizing Method-Induced Deamidation and Isomerization During Antibody Characterization to Ensure Optimal Understanding of Product Quality Attributes

Jason C. Rouse;Elaine Stephens;Shibu Philip;A. Michelle English;Lisa A. Marzilli

March 1st 2017

A new peptide mapping method was developed specifically for mAb characterization that employs optimal enzyme pH for robustness, but with short digestion times and time-course elements to minimize and monitor deamidation–isomerization, respectively, enabling a more accurate assessment of potential CDR sequence liabilities.