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Qualitative and quantitative information on protein aging


Upon processing and storage proteins can be subject to deamidation of asparagine and glutamine residues. The products may exhibit different immunogenic or allergenic properties, and therefore knowledge about this is detrimental for protein drugs. The susceptibility of an amino acid to deamidation is highly site-specific which makes it necessary to resolve which residues are affected to which extent.


We offer site-specific analysis of protein deamidation by high resolution mass spectrometric analysis of proteolyzed protein on peptide level. This enables


-    Comparison to reference sample
-    Site-specific analysis of deamidation
-    Relative quantification of deamidation degree
-    Absolute quantification feasible using reference peptides


Please contact us to discuss your individual project with one of our specialists.