Table 3.
Titer, product quality, and conjugation of aCD74 ADC produced in batch and continuous extract
Batch extract | Continuous extract | ||
---|---|---|---|
CF titer of ProA capture by A280 | 0.45 ± 0.073 g/La, b | 0.56 ± 0.033 g/La, b | |
SEC purity of ProA pool | % Monomer | 74% | 88% |
% High MW | 19% | 5% | |
% Low MW | 7% | 8% | |
SEC purity of polished mAb | % Monomer | 98% | 97% |
% High MW | 0% | 0% | |
% Low MW | 2% | 2% | |
SEC purity of conjugated ADC | % Monomer | 96% | 96% |
% High MW | 2% | 2% | |
% Low MW | 3% | 3% | |
ADC DAR by MALDI‐TOF MS | 1.96 | 1.95 |
Abbreviations: ADC, antibody–drug conjugate; CF, cell free; DAR, Drug Antibody Ratio; MALDI‐TOF MS, matrix‐assisted laser desorption ionization time‐of‐flight mass spectrometry.
Titers are listed ± 1 standard deviation.
Batch and continuous titers are not significantly different with p > 0.08.