400-1000 NIH units/mg protein

lyophilized powder, Suitable for routine use in the thrombin time test

BioUltra, recombinant, expressed in HEK 293 cells, aqueous solution, ≥95% (SDS-PAGE)

powder, cell culture tested, ≥1,500 NIH units/mg protein (E1%/280 = 19.5)

partially purified powder, ≥20,000 units/mg solid

buffered aqueous solution, ≥5 units/mg protein

aqueous glycerol solution; <13 mg/ml (UV); ≥50 units/mg protein; ≥100 units/ml

from bovine plasma