Identification of Antigens in Immune Complexes

  • Nozomi Aibara
  • Kaname OhyamaEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 2024)


Comprehensive identification and profiling of antigens in immune complexes (IC-antigens) is useful to provide insights into pathophysiology and could form the basis for novel diagnostic and treatment strategies for many immune-related diseases. Immune complexome analysis is the method for comprehensively identifying and profiling IC-antigens in biological fluids (such as serum and cerebrospinal fluid). Here, we describe an IC-antigen detection method; specifically, ICs in biological fluids are captured by using protein G- or protein A-coated beads, are subjected to papain-digestion, elution, and tryptic digestion, and are analyzed by nano-liquid chromatography-tandem mass spectrometry (nano-LC-MS/MS).

Key words

Antibody Antigen Immune complex Nano-LC-MS/MS Papain 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Graduate School of Biomedical SciencesNagasaki UniversityNagasakiJapan

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