CAS	9002-04-4
E.C.	3.4.21.5
Synonym	Factor IIa
Source	Human Plasma (certified to be negative for HBsAg and for antibodies to HIV and HCV)
Mw	app. 37'000
Form	lyophilized
Purity	Restriction Grade
Activity	> 2'800 NIH U / mg
Unit Definition	Thrombin concentrations in the literature are typically reported in terms of different units of activity: 1 IOWA unit= 0.83 NIH unit 1 WHO unit = 0.56 NIH unit 1 NIH unit = 0.324 +/- 0.073 µg 1 NIH unit = 1 USP unit The NIH assay procedure uses 0.2 mL of diluted plasma (1:1 with saline) as a substrate and 0.1 mL of thrombin sample (stabilized in a 1% buffered albumin solution at pH 7.35) based on a modification of the method of Biggs. Only clotting times in the range of 15-25 seconds are used for determining thrombin concentrations.

Size	Price
1000 U	200 €
2000 U	380 €
BULK	please inquire