Brand name: Refludan, Generic: Lepirudin rDNA for injection.
Lepirudin is a recombinant hirudin derived from yeast cells. It is almost identical to hirudin extracted from Hirudo medicinalis. It differs by the substitution of leucine for isoleucine at the N-terminal end of the molecule and the absence of a sulfate group on the tyrosine at position 63.
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Lubenow N, Eichler P, Lietz T, Greinacher A (2005). "Lepirudin in patients with heparin-induced thrombocytopenia - results of the third prospective study (HAT-3) and a combined analysis of HAT-1, HAT-2, and HAT-3.". J Thromb Haemost3 (11): 2428–36. doi:10.1111/j.1538-7836.2005.01623.x. PMID16241940.