IgG4 on the dance floor: Partners swapped by Fab-arm exchange

Ailis Grieshaber1, Kevin C O'Connor1

  • 1Departments of Neurology and Immunobiology, Yale University School of Medicine, New Haven, CT, USA.

Science Immunology
|March 6, 2026
PubMed
Summary

Nearly all human IgG4 antibodies undergo Fab-arm exchange, generating a wide range of bispecific antibodies. This proteomic finding reveals a significant mechanism for antibody diversity in circulation.

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