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Related Concept Videos

Antibody Structure01:10

Antibody Structure

65.2K
Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
65.2K
Antibody Structure and Classes01:25

Antibody Structure and Classes

8.1K
Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
8.1K

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Related Experiment Video

Updated: Jan 9, 2026

Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation

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Identifying immunoglobulin abnormalities in the presence of variable polyclonal background.

Jonathan D Coker1, Mindy C Kohlhagen1, Maria A V Willrich1

  • 1Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA.

Journal of Immunological Methods
|December 4, 2025
PubMed
Summary

New mass spectrometry methods improve monoclonal protein (M-protein) detection by separating M-proteins from normal immunoglobulin background. This advanced signal processing enhances quantitation accuracy for plasma cell disorder patient care.

Keywords:
MALDI-TOF mass spectrometryMonoclonal protein quantitationProjection onto convex sets.Singular value decomposition

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Computational Biology

Background:

  • Mass spectrometry is replacing traditional methods like serum protein electrophoresis (SPEP) for monoclonal protein (M-protein) analysis.
  • Improved resolution in mass spectrometry presents signal processing challenges for separating M-proteins from polyclonal immunoglobulin backgrounds.

Purpose of the Study:

  • To develop and validate a novel signal processing algorithm for accurate M-protein separation and quantitation.
  • To model and account for normal variations in immunoglobulin backgrounds during M-protein analysis.

Main Methods:

  • Singular value decomposition (SVD) was used to model normal immunoglobulin variations.
  • A coupled alternating-projection algorithm was applied to separate spectral components.
  • Ion simulation and clinical serum samples were used for validation.

Main Results:

  • The algorithm successfully separated M-proteins from normal polyclonal immunoglobulin background.
  • Experimental results on clinical samples demonstrated acceptable quantitation accuracy.
  • Simulations identified limitations for high-concentration M-protein analysis.

Conclusions:

  • The developed algorithm effectively addresses signal processing challenges in M-protein analysis.
  • Enhancements to the method have expanded the analytical measuring range.
  • This approach improves clinical care for patients with plasma cell disorders.