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. 2021 Oct 25;119(1):162–175. doi: 10.1002/bit.27961

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.

a

Titers are listed ± 1 standard deviation.

b

Batch and continuous titers are not significantly different with p > 0.08.