Refining the Quality of Monoclonal Antibodies: Grafting Unique Peptide-Binding Site in the Fab Framework.

Monoclonal antibodies (mAbs) are a major therapeutic modality. Grafting the meditope binding site onto mAbs, also known as meditope-enabling, can extend the usefulness of mAbs by providing an additional protein-protein interaction surface without altering the stability or antigen binding. We have previously used this site for attaching dyes, cytotoxic drugs, and entire proteins. Here, we provide a simple protocol for meditope-enabling mAbs, and verifying meditope and antigen binding using flow cytometry (FACS).