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Updated: Jun 18, 2026

Measuring the 50% Haemolytic Complement (CH50) Activity of Serum

Measuring the 50% Haemolytic Complement (CH₅₀) Activity of Serum

Published on: March 29, 2010

Preparing serum for functional complement assays.

¹Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 0ES, UK. pjl1000@cam.ac.uk

Journal of Immunological Methods

|November 14, 2009

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Preserving full complement activity requires careful serum preparation, especially for mouse complement due to its unstable classical pathway. Proper techniques ensure reliable complement system research.

Area of Science:

Immunology
Biochemistry

Background:

The complement system is crucial for immune responses.
Mouse complement's classical pathway is known for its instability.
Serum preparation methods impact complement activity conservation.

Purpose of the Study:

To highlight the importance of specific precautions in serum preparation.
To address the challenge of conserving mouse complement activity, particularly the classical pathway.

Main Methods:

Review of established protocols for serum preparation.
Focus on techniques that stabilize the classical complement pathway.

Main Results:

Specific procedural steps are critical for maintaining complement integrity.

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Last Updated: Jun 18, 2026

Measuring the 50% Haemolytic Complement (CH50) Activity of Serum

Measuring the 50% Haemolytic Complement (CH₅₀) Activity of Serum

Published on: March 29, 2010

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

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Determining the Reactivity and Titre of Serum using a Haemagglutination Assay

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Mouse serum requires meticulous handling to prevent classical pathway degradation.

Conclusions:

Adherence to stringent serum preparation protocols is essential for reliable complement studies.
Understanding and mitigating the instability of the mouse complement classical pathway is key.