Chromogenic Substrates for Factor VIII Assay

Asnail now offers chromogenic substrates (S-2222 and S-2765) for factor VIII assay. The chromogenic assay is recommended for clinical diagnosis of haemophilia, monitoring factor replacement therapies and potency assignment of recombinant factor VIII.

Coagulation factor VIII (FVIII) performs a critical role in the intrinsic blood coagulation pathway. The typical quantitative chromogenic assay for coagulation factor VIII is specified in European Pharmacopoeia, as a two-stage procedure.

Chromogenic Assay of Factor VIII

In this assay, coagulation factor VIII first catalyzes the transformation of factor X into its activated form, factor Xa, which in turn catalyzes the release of pNA from the substrate (S-2222 or S-2765). The potency of coagulation factor VIII is deduced by measuring the chromophore, pNA.

Asnail now offers two chromogenic substrates for this assay.

Chromogenic Assays for Heparin

Asnail now offers a wide range of reagents used in chromogenic assays for heparin.

Chromogenic Substrates

Asnail’s chromogenic substrates including:

S-2238, Chromogenic Substrate for Thrombin

S-2222, Chromogenic Substrate for Factor Xa

S-2765, Chromogenic Substrate for Factor Xa

Coagulation Factors

Asnail’s coagulation factors including:

Activated Factor X (FXa)

Alpha-Thrombin (FIIa)

Antithrombin

Asnail provides human antithrombin for both anti-FIIa and anti-FXa assays.

Human Antithrombin

With our expertise in heparin analysis, we also offer technical support with regard to chromogenic assays for heparin and LMWHs.

For more information, please contact us.