Recombinant hirudin got its name from being first isolated from leeches.Natural hirudin is a single-chain polypeptide, which is composed of 65 amino acid residues and has a relative molecular weight of 6986 Dalton.This product is genetically engineered recombinant hirudin ([leu1-thr2]-63-desulfohirudin, Lepirudin) derived from hirudin HV1, in which 1 is substituted for valine by leucine, 2 by threonine for valine, and 63 by tyrosine without sulfite, but its conformation and biological activity are consistent with that of natural hirudin.

Biological Activity	12000 ATU / mg
Purity	Greater than 98.0% as determined by    SDS-PAGE and RP-HPLC.
Molar Mass	6.99 kDa
Source	Produced in Escherichia coli  (E.coli secretion technology).
Physical Appearance	Sterile Filtered White lyophilized    (freeze-dried) powder.
Solubility	It is recommended to reconstitute the    lyophilized protein in sterile H2O.
Storage/Stability	Lyophilized protein should be stored    at < -20°C, though stable at room temperature for 3 weeks.            Reconstituted protein solution can be stored at 4-7°C for 2-7 days.            Aliquots of reconstituted samples are stable at < -20°C for 3 months.
SDS-PAGE
RP-HPLC