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Regulatory Aspects of Impurities in Biological Products - IIR

Regulatory Aspects of Impurities in Biological Products - IIR

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Q6B Def<strong>in</strong>es Process-Related <strong>Impurities</strong><br />

<strong>Impurities</strong> derived from the process<br />

Host cell prote<strong>in</strong>s or source derived prote<strong>in</strong>s<br />

Host cell nucleic acids<br />

Cell culture components<br />

Antibiotics, chemical <strong>in</strong>duction reagents (methyltrexate)<br />

Medium components like transferr<strong>in</strong> or <strong>in</strong>sul<strong>in</strong><br />

Down-stream process related impurities<br />

Organic solvents and detergents (TNBP, tween, triton)<br />

Column leachables (prote<strong>in</strong> A, antibodies, small ligands,<br />

metals)<br />

Enzymes (proteases)<br />

Denaturants (guanid<strong>in</strong>e HCl)

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