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Description: Using peptide mapping, subtle changes to the primary structure of a protein or antibody can be identified that may affect the activity of the protein or the binding affinity. Peptide mapping by LC-MS/MS is one of the most powerful qualitative assays to confirm the primary sequence of proteins or antibodies. This service can be used to compare different lots of the same proteins, antibodies or biosimilars. Service of peptide mapping analysis by LC-MS/MS includes: