OmniCleave™ Endonuclease is a highly purified enzyme from a recombinant E. coli strain that degrades single- and double-stranded DNA and RNA to di-, tri-, and tetranucleotides (Fig. 1). OmniCleave Endonuclease has the same substrate specificity and yields the same products as Benzonase®, an enzyme derived from Serratia marcescens.
Unit Definition: One unit of OmniCleave Endonuclease converts 1.0 A260 (~60 µg) of sonicated salmon sperm DNA into acid-soluble nucleotides in 30 minutes at 37°C in 50 mM Tris-HCl (pH 8.0 at 25°C) and 1 mM MgCl2.
Storage Buffer: 50% glycerol containing 50 mM Tris-HCl (pH 7.5 at 25°C), 0.1 M NaCl, 0.1 mM EDTA, 1 mM DTT, and 0.1% Triton® X-100.
Quality Control: OmniCleave Endonuclease is free of detectable protease activity.
Figure 1. Removal of nucleic acids from cell lysates using OmniCleave™ Endonuclease. Cell lysates were prepared with or without OmniCleave Endonuclease from E. coli cells expressing human lactate dehydrogenase B (LDH) and E. coli alkaline phosphatase (AP). Two microliters of each of the cell lysates were separated by electrophoresis on a 1% agarose gel and the nucleic acids detected by ethidium bromide staining. Lane M, 1-kb ladder.