Activated form of factor V and the cofactor of Xa. Factor Va is a component of the prothrombinase complex which contributes to the increased conversion rate of prothrombin to thrombin.
Source:
Factor Va, from human plasma
Specific Activity:
~1000u/mg
Unit Definition:
1u= Factor V activity in 1ml normal human plasma
Molecular Weight:
~94kD (heavy chain), ~74kD (light chain)
Storage and Stability:
May be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.