Structure of HirudinIt refers to a peptide that occurs naturally in the salivary glands of the blood-sucking leeches. The examples of such blood leeches include Hirudin medicinalis which is known to be having blood anticoagulant property. This property is very crucial for the alimentary habit of the hematophagy shown by the leeches considering that it keeps the blood flowing after the first operation of the phlebotomy is carried out on the ski