- Isolated from a recombinant source
- 5' end labeling of DNA and RNA
- RNase and DNase free
- Supplied with 10X Reaction Buffer
Product SourceA E. coli strain that carries the cloned T4 Polynucleotide Kinase gene. It is purified by a modification of the method of Richardson (1).
The following reagents are supplied with this product:
|Store at (°C)||Concentration|
|T4 Polynucleotide Kinase Reaction Buffer||-20||10X|
Advantages and Features
- End-labeling DNA or RNA for probes and DNA sequencing (2)
- Addition of 5´-phosphates to oligonucleotides to allow subsequent ligation
- Removal of 3´-phosphoryl groups (3)
Properties and Usage
Unit DefinitionOne Richardson unit is defined as the amount of enzyme catalyzing the incorporation of 1 nmol of acid-insoluble [32P] in a total reaction volume of 50 μl in 30 minutes at 37°C in 1X T4 Polynucleotide Kinase Reaction Buffer with 66 µM [γ-32P] ATP (5 x 106 cpm/µmol) and 0.26 mM 5´-hydroxyl-terminated salmon sperm DNA (1).
1X T4 Polynucleotide Kinase Reaction Buffer
Incubate at 37°C
1X T4 Polynucleotide Kinase Reaction Buffer:
70 mM Tris-HCl
10 mM MgCl2
5 mM DTT
pH 7.6 @ 25°C
10 mM Tris-HCl
50 mM KCl
1 mM DTT
0.1 mM EDTA
0.1 μM ATP
pH 7.4 @ 25°C
Heat Inactivation65°C for 20 min
Quality Control AssaysThe following Quality Control Tests are performed on each new lot and meet the specifications designated for the product. Individual lot data can be found on the Product Summary Sheet/Datacard or Manual which can be found in the Supporting Documents section of this page.
- Endonuclease Activity (Nicking):
The product is tested in a reaction containing a supercoiled DNA substrate. After incubation for 4 hours the percent converted to the nicked form is determined by agarose gel electrophoresis.
- Exonuclease Activity (Radioactivity Release):
The product is tested in a reaction containing a radiolabeled mixture of single and double-stranded DNA. After incubation for 4 hours the exonuclease activity is determined by the % release of radioactive nucleotides.
- Non-Specific DNase Activity (16 hour):
The product is tested for non-specific nuclease degradation in a reaction containing a DNA substrate. After incubation for 16 hours there is no detectable degradation of the DNA substrate as determined by agarose gel electrophoresis.
- Phosphatase Activity (Oligo):
The product is tested in a reaction containing a 5'-phosphorylated oligo. After incubation there is no detectable dephosphorylation as determined by SDS-PAGE
- Protein Purity (SDS-PAGE):
The physical purity is assessed by comparing contaminating protein bands in a concentrated sample to the protein of interest band in a sample of known dilution. The purity is determined by SDS-PAGE.
- RNase Activity (1 Hour Digestion):
The product is tested in a reaction containing a RNA substrate. After incubation for 1 hour there is no detectable degradation of the RNA substrate as determined by gel electrophoresis.
- Richardson, C.C. (1981). P.D. Boyer(Ed.), The Enzymes. 14, 229-314. San Diego: Academic press.
- Sambrook, J., Fritsch, E.F. and Maniatis, T. (1989). Molecular Cloning: A Laboratory Manual, (2nd ed.). 10.59-10.67, 11.31-11.33.
- Cameron, V. and Uhlenbeck, O.C. (1977). Biochemistry. 16, 5120-5126.
- Berkner, K.L. and Folk, W.R. (1977). J. Biol. Chem.. 252, 3176-3184.
- What factors can cause incomplete phosphorylation when using T4 Polynucleotide Kinase?
- Can I use T4 Polynucleotide Kinase and T4 DNA Ligase in the same reaction buffer?
- How can the rate of phosphorylation be improved when using T4 Polynucleotide Kinase?
- Do I need to dephosphorylate prior to labeling?
- How much substrate can be phosphorylated in a standard reaction?
- How many units of T4 Polynucleotide Kinase should be used for a typical reaction?
- How do I inactivate the enzyme?
- How to calculate the molarity of ends?
- What labels can be used?