Catalyzes the removal of nucleotides from single-stranded DNA in the 3' to 5' direction.
Highlights
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Isolated from a recombinant source
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3' → 5' single strand exonuclease
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Supplied with 10X Reaction Buffer
Product Source
An E. coli strain that carries the cloned Exo I gene from E. coli NM554.
Reagents Supplied
The following reagents are supplied with this product:
Applications
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Exonuclease I degrades excess single-stranded primer oligonucleotide from a reaction mixture containing double-stranded extension products
Unit Definition
One unit is defined as the amount of enzyme that will catalyze the release of 10 nmol of acid-soluble nucleotide in a total reaction volume of 50 μl in 30 minutes at 37°C in 1X Exonuclease I Reaction Buffer with 0.17 mg/ml single-stranded [3H]-DNA.
Reaction Conditions
1X Exonuclease I Reaction Buffer
Incubate at 37°C
1X Exonuclease I Reaction Buffer:
67 mM Glycine-KOH
6.7 mM MgCl2
10 mM β-ME
pH 9.5 @ 25°C
Usage Concentration
10,000 units/ml
Storage Temperature
-20°C
Storage Conditions
10 mM Tris-HCl
100 mM NaCl
5 mM β-ME
0.5 mM EDTA
100 μg/ml BSA
50% Glycerol
pH 7.5 @ 25°C
Heat Inactivation
80°C for 20 min