Human coagulation factor V (FV), a non-enzymatic cofactor of the prothrombinase complex, is required for the rapid generation of thrombin. FV deficiency is a rare autosomal recessive bleeding disorder. We describe two novel mutations, Tyr91Asn and Asp2098Tyr, found in two probands with a residual FV activity of 51% and 4%, respectively. Modelling and structural analysis of these mutations were ...

A nucleic acid photocross-linking technology was used in the development of a direct assay for factor V Leiden, a point mutation in the factor V gene (G1691A) that is the most common inherited risk factor for thrombosis. This cross-linking hybridization assay included two allele-specific capture probes and six signal-generating reporter probes; all were modified with a photoactivated cross-link...

Coagulation factor V (FV), present in plasma and platelets, is indispensable to thrombin formation, yet patients with undetectable plasma FV seldom experience major bleeding. We used thrombin generation assays to explore the role of platelet FV in 4 patients with severe congenital FV deficiency (3 with plasma FV clotting activity [FV:C] < 1%). When triggered with tissue factor (TF) concentratio...

Genotyping by amplicon melting is a minimalistic approach to geno-typing, requiring only PCR, a fluorescent DNA dye, and single-color acquisition of a melting curve in a closed tube. Multiplex genotyping for the F5 1 [coagulation factor V (proaccelerin, labile factor)] Le-iden (1691GϾA), F2 [coagulation factor II (thrombin)] 20210GϾA, and MTHFR [methylenetetrahy-drofolate reductase (NAD(P)H)] 1...

In his original description of a patient with parahemophilia and his studies on the nature of the defect, Owren (1) proposed that the missing factor, proaccelerin (Factor V), was converted, in the presence of calcium, into a prothrombinconverting substance ("prothrombinase," Factor VI) by the action of tissue thromboplastin. Other investigators, notably Ware and Seegers (2) in a series of studi...

separation of ten sedative- hypnotic drugs was performed by rp-hplc using mixed micellar mobile phase. effect of temperature, type and amount of organic modifier in mobile phase on efficiency (n) and asymmetry factor (b/a) showed that, the appropriate conditions for a good separation were 35°c and 7% (v/v) butanol in mobile phase.  variations of selectivity factor versus butanol concentration, ...