The product is a biosynthetic form of human deoxyribunuclease I (DNase I) enzyme. It is recombinantly produced in genetically modified CHO cells. The 260-amino acid sequence is identical to the endogenous human enzyme. The product cleaves extracellular DNA to 5´-phosphodinucleotide and 5´-phosphooligonucleotide end products without affecting intracellular DNA.