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Updated: May 21, 2026
Measuring the 50% Haemolytic Complement (CH50) Activity of Serum
Published on: March 29, 2010
The complement system of the goat: haemolytic assays and isolation of major proteins
Isabel Moreno-Indias1, Alister W Dodds, Anastasio Argüello
1Animal Science Department, Universidad de las Palmas de Gran Canaria, Arucas, Las Palmas, 35413, Spain.
Background:
The aim of the present study was to develop a haemolytic assay for the study of the complement system in dairy goats (Capra aegagrus hircus) and to characterize the major goat complement system proteins.
Results:
The commonly used sheep erythrocyte sensitized with rabbit antibodies were not sensitive to lysis by goat serum, but the combination of human red blood cells (RBC) plus rabbit antibodies was the best option found for goat complement assay. A buffer based on HEPES instead of the classical veronal (barbitone) was developed. Three proteins were isolated: factor H, C1q and C3 and these were compared with the corresponding human proteins. A novel affinity chromatography technique was developed for isolation of factor H.
Conclusions:
Human RBC plus rabbit antibodies were a suitable option for haemolytic assays. The isolated proteins are similar to the human counterparts.
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