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