The viscometric assay of streptococcal deoxyribonuclease

Abstract The reaction rate curves representing the reaction between streptococcal deoxyribonuclease and sodium deoxyribonucleate are discussed with respect to the viscometric assay of the enzyme. An apparatus is described which permits automatic measurement of flow time in the viscometer, and a reliable and reproducible assay procedure for streptococcal deoxyribonuclease is given.