Protein s chromogenic assay

C - Chemistry – Metallurgy – 12 – Q

Patent

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C12Q 1/56 (2006.01) G01N 33/86 (2006.01)

Patent

CA 2100567

A chromogenic assay for determination of Protein S, using an indicator of Factor Xa as a measure of Protein S concentration. This technique utilizes the dependency of activated Protein C on Protein S in order to inactivate a known portion of Factor VIII. Residual Factor VIII is then activated and acts with Factor IXa to activate Factor X. The chromogenic substrate is then cleaved by Factor Xa and the rate of conversion of the indicator molecule is an indirect indicator of free Protein S.

Essai chromogène pour le dosage de la protéine S, faisant appel à un indicateur, le Facteur Xa, comme mesure de la concentration de la Protéine S. Cette technique met à contribution la dépendance de la Protéine C activée à l'égard de la Protéine S pour inactiver une partie connue du Facteur VIII. Le Facteur VIII résiduel est ensuite activé et agit de concert avec le Facteur IXa pour activer le Facteur X. Le substrat chromogène est ensuite clivé par le Facteur Xa et le taux de conversion de la molécule indicatrice est une indication indirecte de la concentration de Protéine S libre.

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