LeechesHirudinsHirudo medicinalisPharmacologyPharmacology, ClinicalThrombinLeechingAntithrombinsPartial Thromboplastin TimeFibrinopeptide AGangliaGanglia, InvertebrateHeparinFibrinopeptide BRecombinant ProteinsAmino Acid SequenceReceptors, ThrombinInvertebrate HormonesMolecular Sequence DataAntithrombin IIIFibrinolytic AgentsBlood Coagulation