Description: New England Biolabs supplies a 10X reaction buffer with all of its enzymes. At a 1X concentration this reaction buffer assures optimal activity of the enzyme.
Reagents Supplied: 10X Exonuclease I Reaction Buffer
1X Exonuclease I Reaction Buffer:
67 mM Glycine-KOH
6.7 mM MgCl2
10 mM 2-Mercaptoethanol pH 9.5 @ 25°C
16-Hour Incubation: A 50 µl reaction containing this reaction buffer at a 1X concentration and 1 µg of HaeIII digested ΦX174 RF I DNA incubated for 16 hours resulted in no detectable non-specific nuclease degradation.
Endonuclease Activity: Incubation of this reaction buffer at a 1X concentration with 1 µg ΦX174 RF I DNA for 4 hours at 37°C in 50 µl reactions resulted in less than 5% conversion to RF II.