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Updated: Aug 13, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
A method for detecting factor-VIII clotting activity associated with factor VIII-related antigen in agarose gels
Abstract:
A method for detecting factor-VIII clotting activity in agarose is described. It is based on factor VIII promoting coagulation in a mixture of haemophilic plasma in agarose which is detected by a change in opacity. When this test was used to detect factor-VIII clotting activity in a one-dimensional Laurell electroimmunoassay for factor VIII-related antigen all the factor-VIII activity was found in the same position as the factor VIII-related antigen immunoprecipitate. Factor-VIII clotting activity did not appear to be simply trapped in this immunoprecipitate and therefore it has been concluded that the molecule containing factor-VIII clotting activity carries factor VIII-related antigen determinants.
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